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Kunal 19/03/2016 in  BTech Tuition

What are the conditions of equilibrium of rigid bodies?

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Nithyananda replied | 27/04/2016

1. the vector sum of forces on the body must be zero and
2. the vector sum of torques on the body must be zero

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Ashutosh replied | 17/05/2016

For equilibrium the body should be in translational equilibrium (vector sum of forces on the body must be zero) and rotational equilibrium (the vector sum of torques on the body must be zero).

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Harsh 19/03/2016 in  BTech Tuition

Can you state the laws of dry friction?

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Vikash Lomash replied | 16/06/2016

Dry friction resists relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into static friction ("stiction") between non-moving surfaces, and kinetic friction between moving surfaces.

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Deepesh replied | 17/06/2016

Law of riction states that Friction will oppose the relative motion between two surfaces .

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Manchala 18/03/2016 in  BTech Tuition

What are Ultrasonic Waves?

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Vishal replied | 18/03/2016

These are the waves having frequencies (Vibrations/oscillations of particles) above those of audible sound waves-greater than about 20 kHz. Many animals have the ability to hear sounds in the human ultrasonic frequency range. A presumed sensitivity of roaches and rodents to frequencies in the 40 kilohertz region has led to the manufacture of pest controllers that emit loud sounds...  more»
These are the waves having frequencies (Vibrations/oscillations of particles) above those of audible sound waves-greater than about 20 kHz. Many animals have the ability to hear sounds in the human ultrasonic frequency range. A presumed sensitivity of roaches and rodents to frequencies in the 40 kilohertz region has led to the manufacture of “pest controllers” that emit loud sounds in that frequency range to drive the pests away. «less

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Ashutosh replied | 28/04/2016

Vibrations of frequencies greater than the upper limit of the audible range for humans—that is, greater than about 20 kilohertz.

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Bhushan 18/03/2016 in  BTech Tuition

What are the advantages of Integrated Circuits?

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Maneesh replied | 13/04/2016

Small, consumes less power, low maintenance, low cost

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Nithyananda replied | 14/04/2016

1.Extremely small size -- Thousands times smaller than discrete circuits. It is because of fabrication of various circuit elements in a single chip of semiconductor material.
2.Very small weight owing to miniaturised circuit.
3.Very low cost because of simultaneous production of hundreds of similar circuits on a small semiconductor wafer. 4.Owing to mass production of...  more»
1.Extremely small size – Thousands times smaller than discrete circuits. It is because of fabrication of various circuit elements in a single chip of semiconductor material.
2.Very small weight owing to miniaturised circuit.
3.Very low cost because of simultaneous production of hundreds of similar circuits on a small semiconductor wafer. 4.Owing to mass production of an IC costs as much as an individual transistor.
5.More reliable because of elimination of soldered joints and need for fewer interconnections.
6.Lower power consumption because of their smaller size.
7.Easy replacement as it is more economical to replace them than to repair them.
8.Increased operating speed because of absence of parasitic capacitance effect.
9.Close matching of components and temperature coefficients because of bulk production in batches.
10.Improved functional performance as more complex circuits can be fabricated for achieving better characteristics.
11.Greater ability of operating at extreme temperatures.
12.Suitable for small signal operation because of no chance of stray electrical pickup as various components of an 13.INC are located very close to each other on a silicon wafer.
14.No component project above the chip surface in an INC as all the components are formed within the chip. «less

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Akash 18/03/2016 in  BTech Tuition

Why modulation is so important?

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Nakka.suneel replied | 14/04/2016

It means changes one phase to another phase,ex: mechanical energy is converted in to electrical energy.

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Parul replied | 15/04/2016

Modulation is, generically, a means of shifting information from one frequency domain into (typically) a higher frequency domain. This provides a number of benefits; among them:

Two or more input signals with matching or overlapping frequency domains may have their information shifted into disjoint frequency domains; if such signals travel together through a medium, having...  more»
Modulation is, generically, a means of shifting information from one frequency domain into (typically) a higher frequency domain. This provides a number of benefits; among them:

Two or more input signals with matching or overlapping frequency domains may have their information shifted into disjoint frequency domains; if such signals travel together through a medium, having their frequency domains be disjoint will allow them to be separated.

In many cases it's easier to uniformly handle signals where the minimum frequency is a substantial fraction of the maximum, than signals where the maximum is many times the minimum. An audio signal whose frequency content is 20-20,000Hz has a 1,000:1 spread between the minimum and maximum frequencies. If such a signal were amplitude-modulated at 1MHz, the spread would be about 4% [from 980,000Hz to 1,020,000Hz]. Even if there were no other radio communications anywhere in the world, trying to design an antenna which could work well with a 1,000:1 frequency spread (from 20Hz to 20KHz) would be very difficult. Designing an antenna to deal with a 4% spread would be much easier.

Some use cases for modulation exploit both benefits; others only rely upon one or the other. «less

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Meenakshisundarams 17/03/2016 in  BTech Tuition

What is the role of Civil Engineers in the infrastructure development of a country?

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Vimala replied | 17/03/2016

designing the structure of building

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Harsha replied | 05/06/2016

especially every finger of a hand has its unique importance. Like the same when we talk about infrastructure the roots of engineering starts with #Architecture #Structural engineering #civil engineering #project management. So in the context of civil engineering execution plays major role which initiates real time practical engineering. So the creditof creating lines into real...  more»
especially every finger of a hand has its unique importance. Like the same when we talk about infrastructure the roots of engineering starts with #Architecture #Structural engineering #civil engineering #project management. So in the context of civil engineering execution plays major role which initiates real time practical engineering. So the creditof creating lines into real structures goes to a civil engineer. «less

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Nasar 17/03/2016 in  BTech Tuition

What is ranging?

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Karthik replied | 17/03/2016

difference between maximum and minimum

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Ritesh replied | 17/03/2016

A term used in surveying in civil engg

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Sandhya 17/03/2016 in  BTech Tuition

What are the difference between spontaneous & stimulated emissions?

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Nithyananda replied | 14/04/2016

Spontaneous emission: electron drops from an excited state to a lower state (no outside mechanism) - emitting a photon.
Stimulated emission (lasers): photon of the same frequency interacts with electron in excited state which drops to lower state - the emitted photon is coherent with the incoming photon .

Detailed description:
Spontaneous emissionis the process...  more»
Spontaneous emission: electron drops from an excited state to a lower state (no outside mechanism) - emitting a photon.
Stimulated emission (lasers): photon of the same frequency interacts with electron in excited state which drops to lower state - the emitted photon is coherent with the incoming photon .

Detailed description:
Spontaneous emissionis the process by which a quantum system such as an atom, molecule, nanocrystal or nucleus in an excited state undergoes a transition to a state with a lower energy (e.g., the ground state) and emits quanta of energy. Light or luminescence from an atom is a fundamental process that plays an essential role in many phenomena in nature and forms the basis of many applications, such as fluorescent tubes, older television screens (cathode ray tubes), plasma display panels, lasers, and light emitting diodes. Lasers start by spontaneous emission, and then normal continuous operation works by stimulated emission.

Stimulated emissionis the process by which an atomic electron (or an excited molecular state) interacting with an electromagnetic wave of a certain frequency may drop to a lower energy level, transferring its energy to that field. A new photon created in this manner has the same phase, frequency, polarization, and direction of travel as the photons of the incident wave. This is in contrast to spontaneous emission which occurs without regard to the ambient electromagnetic field.
However, the process is identical in form to atomic absorption in which the energy of an absorbed photon causes an identical but opposite atomic transition: from the lower level to a higher energy level. In normal media at thermal equilibrium, absorption exceeds stimulated emission because there are more electrons in the lower energy states than in the higher energy states. However, when a population inversion is present the rate of stimulated emission exceeds that of absorption, and a net optical amplification can be achieved. Such a gain medium, along with an optical resonator, is at the heart of a laser or maser. Lacking a feedback mechanism, laser amplifiers and superluminescent sources also function on the basis of stimulated emission.
Stimulated emission was a theoretical discovery by Einstein within the framework of the old quantum theory, wherein the emission is described in terms of photons that are the quanta of the EM field. Stimulated emission can also be described classically, however, without reference to either photons, or the quantum-mechanics of matter «less

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Pallav replied | 02/06/2016

When electron lifetime is finish then it release energy(photon) and back to the valence band it is called spontaneous emission.But when photon is incident on electron of conduction band so it release two photon it is called stimulation emission.

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Kumarpalaksha 17/03/2016 in  BTech Tuition

Why Nano composite is different from ordinary composite?

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Sunny replied | 01/05/2016

The main reason for your question is properties of Nano composite . Every composite are categorized on the basis of their properties. Nano composite are made up of Nano materials.

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Bisal replied | 31/05/2016

fillers will be of nanodimension

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Saritha A.k 17/03/2016 in  BTech Tuition

What is Rayleigh Scattering?

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Nithyananda replied | 14/04/2016

scattering of light by particles small enough to render the effect selective so that different colors are deflected through different angles

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Debraj Paul replied | 15/04/2016

Rayleigh scattering refers to the scattering of light off of the molecules of the air, and can be extended to scattering from particles up to about a tenth of the wavelength of the light. It is Rayleigh scattering off the molecules of the air which gives us the blue sky.

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Vignesh 16/03/2016 in  BTech Tuition

Hi I Have completed my BE(EEE) and i have secured rank holder from anna univ.I have 1.4 years of IT experience in wipro.Is their any vacancy for lecturer post in chennai.I can handle electrical and computer science papers.I am very much interested in teaching

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Pavan replied | 18/06/2016

I don't know in Chennai you can try in any polytechnic colleges in bangalore. If you have an MTech degree you can try in any of the engg colleges as asst professor

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Dhananjay replied | 22/06/2016

A relevant M.tech degree would be a must for faculty position at undergraduate level. You have a fairly good chances in polytechnic colleges with EEE stream. Industry experience may also help you in this regard. After gaining at least 2 years of experience you may easily register for a part time ME/M.Tech in any institution of repute which are nearby your work-place. And subsequently...  more»
A relevant M.tech degree would be a must for faculty position at undergraduate level. You have a fairly good chances in polytechnic colleges with EEE stream. Industry experience may also help you in this regard. After gaining at least 2 years of experience you may easily register for a part time ME/M.Tech in any institution of repute which are nearby your work-place. And subsequently after registration you may switch to your desired job. This would be the best possible way out. «less

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Samskriti 16/03/2016 in  BTech Tuition

What do you understand by “Grade of concrete”

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Nithyananda replied | 14/04/2016

Grade of concrete refers to the strength of concrete after a period of 28 days.

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Hrishikesh replied | 18/04/2016

The grade tells you the characteristic compressive strength of concrete. Which means if you have 100 concrete cubes of a given grade (say M20), only 5 percent (5 cubes) of the sample will have a strength less than the given characteristic compressive strength (that is 20).

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Akhil 16/03/2016 in  BTech Tuition

What is the scope of Geotechnical Engineering?

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Nithyananda replied | 14/04/2016

Geotechnical engineering uses principles of soil mechanics and rock mechanics to investigate subsurface conditions and materials; determine the relevant physical/mechanical and chemical properties of these materials; evaluate stability of natural slopes and man-made soil deposits; assess risks posed by site conditions; design earthworks and structure foundations; and monitor site...  more»
Geotechnical engineering uses principles of soil mechanics and rock mechanics to investigate subsurface conditions and materials; determine the relevant physical/mechanical and chemical properties of these materials; evaluate stability of natural slopes and man-made soil deposits; assess risks posed by site conditions; design earthworks and structure foundations; and monitor site conditions, earthwork and foundation construction.
A geotechnical engineer uses his education and experience to guard and maintain the earth's physical environment with the development of major public and private projects. His expertise in civil engineering construction and design enable him to safely investigate and analyze sites and determine their present and future stability. So future of geotechnical engineering is very good. «less

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Tularam replied | 07/06/2016

As per my experience,limited scope to Geotechnical Engg, if u r plannning MS in US then it is good. Prefer Geology

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Gopinath 16/03/2016 in  BTech Tuition

What is the scope of Structural Engineering?

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Debraj Paul replied | 17/03/2016

As most of the construction works require the service of structural engineers, demand and scope for these engineers are much more than any other engineering

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Harsha replied | 05/06/2016

Buildings, tall structures, rockets, automobiles, navy, millatary, every infrastructure, and alot.

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Somil 15/03/2016 in  BTech Tuition

What is Wet Steam?

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Nithyananda replied | 14/04/2016

Wet steam is a mixture of steam and liquid water. It is also called as Supersaturated steam

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Debraj Paul replied | 18/04/2016

Wet steam (sometimes called 'supersaturated steam') is a mixture of steam and liquid water. That's why it is said to be a two-phase mix : steam contains droplets of water that hasn't changed phase. In wet steam, water and steam are at saturation temperature.

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Deepthi 15/03/2016 in  BTech Tuition

Can anyone explain Fourier law of heat conduction?

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Anju replied | 15/03/2016

fourier's law of conduction-it states that the rate of heat transfer by conduction along a given direction is directly proportional to temparature gradient along the direction and also directly proportional to the area of heat transfer perpendicular to the direction of heat transfer

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Raman replied | 07/06/2016

Fourier law states that heat transfer by conduction is directly proportional to temperature difference and area of heat transfer parallel to direction of heat flow i.e. dQ = -KAdT.
Here K represent the thermal conductivity of body, A is the area and dT is the temp. difference. Negative sign show the heat transfer toward lower temp. body.

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Ashwini 15/03/2016 in  BTech Tuition

What are Bogues compounds?

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Debraj Paul replied | 16/03/2016

The calculations are based on a system developed by R.H. Bogue. Therefore, the calculated composition is often referred to as the "Bogue Compounds." Of the four Bogue compounds, tricalcium silicate (C3S) in cement chemist notation) is typically the most abundant.

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Harsha replied | 05/06/2016

Cement has its unique importance in construction industry. Since cement is not a ready made material it constitute of some chemical elements. For a successful cement material the composition of the chemical elements are such that they will produce a successful cement. Some of the compounds are Calcium, aluminum, silicate, magnesium and some more. Pls. Refer m s shetty text book for more details.

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Ankit 15/03/2016 in  BTech Tuition, BTech Civil Engineering(BTech Tuition)

In force method of analysis how to use virtual work principle?

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Sumimolss 14/03/2016 in  BTech Tuition

Is there any similarity between IIT and NIT BTech syllabus?

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Chhavi replied | 23/04/2016

Hi Sumimolss,
There is a standard for a particular stream for under graduation and it has to be followed in all over idea. So everywhere syllabus will b approximately similar either it is IIT or NIT or any other university, u will find similarities.

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Preeti replied | 23/04/2016

Syllabus is almost same except few topics which is deliberately added. Variations occurs at assignments, exam questions and IQ level.

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Abhishek 14/03/2016 in  BTech Tuition

What are the different types of single phase induction motor?

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Sunny replied | 29/04/2016

There are 4 types of Induction motor :
1- split phase IM.
2- Capacitor start IM.
3- Capacitor start capacitor run IM.
4- Shaded Pole IM

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G Goutham replied | 30/05/2016

Resistance split phase,capacitor start,capacitor start capacitor run and shaded pole

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Akshay 14/03/2016 in  BTech Tuition

Can you please derive the expression for the RMS value of a sinusoidal voltage?

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Manas replied | 30/03/2016

The word RMS means root mean square, so Vrms is square root of mean of square of voltages.
I think it's self explanatory, doesn't requires any proof.

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G Goutham replied | 08/06/2016

Root mean square of voltage

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Anish 14/03/2016 in  BTech Tuition

Compare Petrol and Diesel engines?

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Nithyananda replied | 14/04/2016

1.

The diesel engine work on diesel cycle.

The petrol engine works on Otto engine.



2.

In this engine Diesel is used as fuel which is a non-volatile fuel.

In this engine petrol which is a high volatile fuel is used as fuel.

3.

In the diesel engine the air is sucked during the suction stroke...  more»
1.

The diesel engine work on diesel cycle.

The petrol engine works on Otto engine.



2.

In this engine Diesel is used as fuel which is a non-volatile fuel.

In this engine petrol which is a high volatile fuel is used as fuel.

3.

In the diesel engine the air is sucked during the suction stroke and the fuel is injected into combustion chamber thru injector.

In the petrol engine the air-fuel mixture sucked during the suction stroke.



4.

The ignition is due to the heat generated during the compression stroke by the high compressed ratio. So it is called compression ignition (CI) engine.

The spark is generated by the spark plug into the combustion chamber so the ignition is due to the spark by external source so it is called spark ignition (SI) engine.

5.

Due to high compression ratio it have large vibration so it develop more noise.

Due to less compression ratio it has small vibration so it develop less noise.



6.

To handle the high compression ratio it has heavy metal so it is heavier than petrol engine.

It has low compression ratio so they are light in weight.



7.

This engine used injector to inject the fuel in combustion chamber.

This engine used spark plug to ignite the fuel in the combustion chamber.



8.

Due to heavy weight and also due to heterogeneous combustion, they are low speed engines.

Due to light weight and also due to homogeneous combustion, they are high speed engines. «less

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Abhishek replied | 16/04/2016

you can take a demo class on ic engine

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Akash 14/03/2016 in  BTech Tuition

What are the differences between Renewable & Non Renewable energy resources?

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Vignesh replied | 16/03/2016

Renewable source is available at all time.It will not extinct Because the source is regenerated Eg.Sunlight, Wind . But non renewable resource cannot be regenerated.It will extinct. Eg:Petrol

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Mamatha replied | 25/05/2016

RENEWABLE RESOURCES:They are the energy sources which are continuously produced by the nature. The sunlight, wind power, water, plants and biomass are some of the examples for renewable energy sources. The nature of these energy sources is, they are continuously replenished by the nature, when people consume them. These sources do not directly provide energy, but these energy sources...  more»
RENEWABLE RESOURCES:They are the energy sources which are continuously produced by the nature. The sunlight, wind power, water, plants and biomass are some of the examples for renewable energy sources. The nature of these energy sources is, they are continuously replenished by the nature, when people consume them. These sources do not directly provide energy, but these energy sources can transform into usable energy form.
NON RENEWABLE RESOURCES :These energy sources are limited and their production rate is very slow. Examples of non-renewable energy sources are coal, oil, peat and nuclear power. It is very convenient to use non-renewable energy sources (fuel, natural gas, coal, etc ) to fullfill our energy requirements, but we have a limited supply on the earth. «less

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Aparna 13/03/2016 in  BTech Tuition

How can I seek admission for BTech in any of the NITs?

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Satyajit replied | 13/03/2016

Admission to Undergraduate Engineering Programs at NITs, IIITs, Other Centrally Funded Technical Institutions shall include the performance in the class 12/equivalent qualifying Examination and in the Joint Entrance Examination, JEE (Main).

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Kumar replied | 21/06/2016

You should crack IITJee prelims with good rank

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Rajinder 13/03/2016 in  BTech Tuition

What is the difference between BTech and BE?

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Phaniram replied | 14/03/2016

Both are same. it is dependent on University. JNTU-B.Tech, Annamalai... B.E

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Prosun replied | 21/03/2016

After independence, In India we have two types of universities, one that offers degrees in many fields like Sciences, Arts and Engineering too, and the second set of universities (were named as institutes) offer only degrees in engineering. Universities those offer other degrees along with engineering named their engineering degree as BE (Bachelor of Engineering) and Institute constituted...  more»
After independence, In India we have two types of universities, one that offers degrees in many fields like Sciences, Arts and Engineering too, and the second set of universities (were named as institutes) offer only degrees in engineering. Universities those offer other degrees along with engineering named their engineering degree as BE (Bachelor of Engineering) and Institute constituted for only Engineering studies named their degree as B.Tech (Bachelor of Technology)
simply one can have a broad idea that,
BE is knowledge oriented.
B Tech is skill oriented. «less

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