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U

Uma 25 Nov in  GATE Coaching classes, Architecture and Planning(GATE Coaching classes)

Hi, I am an architecture student doing my fourth year now. I am confused as to what to do after architecture. I want some advice. If I do project management, how will that help?

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Hussam Uddin replied | 25 Nov

Do M.Arch and go for teaching as Assistant professor.

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Meenu Ranka replied | 25 Nov

Hi Uma,
I suggest you not to take up project management as it'll keep you away from designing.
Instead there are various options like landscaping, conservation, urban design which are related to architecture.
You can select anyone that you think you are interested in.
I hope I've been of help.
Good luck dear.

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S

Sheekha 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is the overall impulse response of the cascaded system if the two systems with impulse h1(t) and h2(t) are connected in cascade?

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Pratik replied | 01 Dec

H1(s) * H2(s)

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Sathyaprakash replied | 02 Dec

h1(t)*h2(t).

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V

Vikas 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is the fundamental frequency in rad/s for a periodic signal v(t) = 30 sin 100t + 10 cos 300t + 6 sin(500t + pie / 4)?

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Sanjeev replied | 30 Nov

2pi/500

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Sathyaprakash replied | 02 Dec

100 rad/s.

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R

Rayyan 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

A band limited signal with a maximum frequency of 5kHZ is to be sampled. Then what is the value of sampling frequency?

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Sathyaprakash replied | 01 Dec

More than 10 kHz.

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A

Affaan 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

Define Laplace transform?

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Vikas replied | 02 Dec

The Laplace transform is an integral transform named after its discoverer Pierre-Simon Laplace.
It takes a function of a positive real variable t (often time) to a function of a complex variable s (frequency).
While the Fourier transform of a function is a complex function of a real variable (frequency), the Laplace transform of a function is a complex function of a complex...  more»
The Laplace transform is an integral transform named after its discoverer Pierre-Simon Laplace.
It takes a function of a positive real variable t (often time) to a function of a complex variable s (frequency).
While the Fourier transform of a function is a complex function of a real variable (frequency), the Laplace transform of a function is a complex function of a complex variable. Laplace transforms are usually restricted to functions of t with t > 0. A consequence of this restriction is that the Laplace transform of a function is a holomorphic function of the variable s. Unlike the Fourier transform, the Laplace transform of a distribution is generally a well-behaved function. Also techniques of complex variables can be used directly to study Laplace transforms. As a holomorphic function, the Laplace transform has a power series representation. This power series expresses a function as a linear superposition of moments of the function. This perspective has applications in probability theory. «less

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Vikas replied | 02 Dec

The Laplace transform is an integral transform named after its discoverer Pierre-Simon Laplace.
It takes a function of a positive real variable t (often time) to a function of a complex variable s (frequency).
While the Fourier transform of a function is a complex function of a real variable (frequency), the Laplace transform of a function is a complex function of a complex...  more»
The Laplace transform is an integral transform named after its discoverer Pierre-Simon Laplace.
It takes a function of a positive real variable t (often time) to a function of a complex variable s (frequency).
While the Fourier transform of a function is a complex function of a real variable (frequency), the Laplace transform of a function is a complex function of a complex variable. Laplace transforms are usually restricted to functions of t with t > 0. A consequence of this restriction is that the Laplace transform of a function is a holomorphic function of the variable s. Unlike the Fourier transform, the Laplace transform of a distribution is generally a well-behaved function. Also techniques of complex variables can be used directly to study Laplace transforms. As a holomorphic function, the Laplace transform has a power series representation. This power series expresses a function as a linear superposition of moments of the function. This perspective has applications in probability theory.
The Laplace transform is invertible on a large class of functions. The inverse Laplace transform takes a function of a complex variable s (often frequency) and yields a function of a real variable t (time). Given a simple mathematical or functional description of an input or output to a system, the Laplace transform provides an alternative functional description that often simplifies the process of analyzing the behavior of the system, or in synthesizing a new system based on a set of specifications. So, for example, Laplace transformation from the time domain to the frequency domain transforms differential equations into algebraic equations and convolution into multiplication.
The Laplace transform is particularly useful in solving linear ordinary differential equations such as those arising in the analysis of electronic circuits. «less

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M

Manu 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

A car travels 8 km in the first quarter of an hour, 6 km in the second quarter and 16 km in the third quarter. What is the average speed of the car in km per hour over the entire journey?

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Vikas replied | 23 Nov

d1/t1 = 8 /0.25 = 32 Km /Hr (1st quarter speed).
d2/t2 = 6/0.25 = 24 Km/Hr (2nd quarter speed).
d3/t3 = 16/0.25 = 64 Km/Hr (3rd quarter speed).
Hence the average speed for all quarters = (32+24+64)/3 = 120 / 3 = 40 km/Hr.

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Sethu Bharath Yadav replied | 25 Nov

Speed = distance/time
= (8+6+16)/(1/4+1/4+1/4)
= (30)/(3/4)
= 40 kmph.

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P

Priyanka 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is the chance that a leap year, selected at random, will contain 53 Saturdays?

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Vikas replied | 02 Dec

A leap year has 366 days = 52 weeks ( 52x7 days) + 2 days = 364 + 2 = 366 Days
So, we are looking for either of these extra 2 days being Saturday.
We have 7 week days , we have 2 extra days in leap year over 52 weeks.
Thus probability that any day of the week is Saturday is 1/7
Here we have 2 Extra days ==> Total Probability = 1/7 + 1/7 = 2/7
Hence the chance...  more»
A leap year has 366 days = 52 weeks ( 52x7 days) + 2 days = 364 + 2 = 366 Days
So, we are looking for either of these extra 2 days being Saturday.
We have 7 week days , we have 2 extra days in leap year over 52 weeks.
Thus probability that any day of the week is Saturday is 1/7
Here we have 2 Extra days ==> Total Probability = 1/7 + 1/7 = 2/7
Hence the chance that a leap year selected at random will contain 53 Saturdays is 2/7. «less

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S

Satish 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What do you mean by L,C,R circuit?

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Vikas replied | 01 Dec

An inductor (L), and a capacitor (C), a resistor (R), connected in series or in parallel make electrical circuit.
The name of the circuit is derived from the letters that are used to denote the constituent components of this circuit.

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A

Ananya 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What do you mean by impedance?

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Shyama replied | 03 Dec

Impedence is an expression used to denote any opposition offered by an electrical component say a circuit, to an alternative current or direct current when a voltage is applied. The impedence is denoted by z. This resistance consists of two independent phenomena-resistance and reactance.

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Bibin replied | 03 Dec

It is essentially resistance.

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Answer

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S

Shaun 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What do you mean by discrete - time function?

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Pratik replied | 01 Dec

Discontinuous time. For example a doctor measure temperature of a patient after an interval of 5 hours. So doctor will have patient's temperature at interval of 5 hours. So temperature is a discrete time function.

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A

Abinaya 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is signal to noise ratio?

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Fast replied | 01 Dec

Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to the noise power, often expressed in decibels.

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Shyama replied | 02 Dec

Signal to noise ratio is defined as the ratio of power of signal to the power of noise. The signal is the needed information and the noise is an unwanted signal.
This is a parameter used by Shannon to give a relationship between signal power and noise power.
SNR=Signal Power/ Noise Power.
SNR in decibels(db) gives how much the intended signal exceeds noise signal.
SNRdb=...  more»
Signal to noise ratio is defined as the ratio of power of signal to the power of noise. The signal is the needed information and the noise is an unwanted signal.
This is a parameter used by Shannon to give a relationship between signal power and noise power.
SNR=Signal Power/ Noise Power.
SNR in decibels(db) gives how much the intended signal exceeds noise signal.
SNRdb= 10log to the base 10 SNR «less

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Answer

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M

Manish 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

Place an appropriate phrase: Frogs ________ ?

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Vikas replied | 02 Dec

Frogs falling from the sky , Frogs raining from the sky

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M

Madhavan 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

A region of negative differential resistance is observed in the current voltage characteristics of a silicon pn junction if____________ ?

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Shantanu replied | 22 Nov

Both the P-region and the N-region are heavily doped.

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Brain Hub replied | 27 Nov

Both the p-region and n-region are heavily doped.

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Answer

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A

Awdhesh 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

Define polar plot?

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Sanjeev replied | 30 Nov

A plot of radial distance versus the angle it makes with the x-axis is called polar plot.

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Vikas replied | 01 Dec

Polar Plot. A plot of a function expressed in polar coordinates, with radius as a function of angle.

As we have Cartesian Plot X,Y Graph, similarly R,Theta Coordinates i.e. Radius & Angle coordinates gives Polar Plot.

To convert from Polar Coordinates (r,theta) to Cartesian Coordinates (x,y) :
x = r × cos( theta )
y = r × sin(theta )

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Answer

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R

Rajesh 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is the difference between the low - pass signal and band - pass signal?

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Reneeta replied | 27 Nov

A low pass signal is a signal which has lower frequency very close to zero or zero. The signal can have a maximum frequency (f) till which the frequency spectrum extends. A band pass signal consists of a frequency band in which the lower frequency is much higher than zero frequency.

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M replied | 28 Nov

Signal with low frequency that pass through low pass filter and signal with medium frequency that pass through band pass filter.

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Answer

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S

Sahiba 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is the maximum amplitude of the sinusoidal signal (in volts) to prevent slope overload of the sinusoidal signal of 2 kHz frequency is applied to a delta modulator. The sampling rate and step-size of the delta modulator are 20,000 samples per second and 0.1 V, respectively?

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Sathyaprakash replied | 01 Dec

0.159 V.

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Answer

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D

Dilip 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

Define NMOSFET?

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Vikas replied | 01 Dec

A metal-oxide-semiconductor field-effect transistor (MOSFET) is a voltage-controlled electronic component invented by a South Korean Engineer Dawon Kahng, and his colleague Martin M. Atalla in 1959 whilst working at Bell Labs. It was the first insulated gate FET, consisting of a metal gate (M), oxide insulation (O), and silicone semiconductor material (S). In this device, a voltage...  more»
A metal-oxide-semiconductor field-effect transistor (MOSFET) is a voltage-controlled electronic component invented by a South Korean Engineer Dawon Kahng, and his colleague Martin M. Atalla in 1959 whilst working at Bell Labs. It was the first insulated gate FET, consisting of a metal gate (M), oxide insulation (O), and silicone semiconductor material (S). In this device, a voltage at the gate junction produces an electric field, which controls the current flowing between the source and drain junctions. This MOS technology was later utilised to develop integrated circuits (IC) which Kahng foresaw.
The differences in the operation between a MOSFET and a bipolar junction transistor (BJT) are huge, but the main ones are that a BJT is a current controlled device because current at the base junction controls the flow of current between the collector and emitter junctions. However, a MOSFET is a voltage-controlled device, where a voltage at the gate junction creates an electric field, which controls the flow of current between the source and drain junctions. «less

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P

Pankaj 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

In a forward biased pn junction diode, the sequence of events that best describes the mechanisms of current flow is____?

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Brain Hub replied | 24 Nov

Injection and subsequent diffusion and recombination of minority carriers.

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M

Mridulika 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What type of gas produced when the IC technology, dry oxidation as compared to wet oxidation?

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Vikas replied | 30 Nov

In dry oxidation no gas is produced.
In Wet Oxidation Hydrogen gas is produced.
Wet Oxidation:-
It is a form of hydro thermal reaction. The oxidation is done by involving the dissolved components in H2O with oxygen as a oxidizer.
The chemical reaction is:
Si + 2 H2O -> SiO2 + 2H2
Dry Oxidation:-
Dry oxidation has lower growth rate than wet oxidation,...  more»
In dry oxidation no gas is produced.
In Wet Oxidation Hydrogen gas is produced.
Wet Oxidation:-
It is a form of hydro thermal reaction. The oxidation is done by involving the dissolved components in H2O with oxygen as a oxidizer.
The chemical reaction is:
Si + 2 H2O -> SiO2 + 2H2
Dry Oxidation:-
Dry oxidation has lower growth rate than wet oxidation, although the oxide film quality is better.
The chemical reaction for Silicon and Oxygen is:-
Si + O2 -> SiO2. «less

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M

Meenakshisundarams 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is the sampling frequency if a band limited with a maximum frequency of 5kHz is to be sampled?

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Sushil replied | 25 Nov

2*5 kHz = 10 kHz.

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A

Ashwin 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is the value of accumulator at the end of program for 8085 microprocessor if the program is executed:
MVI A, 05H;
MVI B, 05H;
PTR: ADD B;
DCR B;
JNZ PTR;
ADI03H;
HLT;?

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Sushil replied | 22 Nov

17H

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Answer

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A

Alifiya 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

What is the minimum bandwidth required for ISI free transmission if the modulation used is 32 QAM?

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Sushil replied | 22 Nov

2 * 5* 4 = 40Kbps

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Brain Hub replied | 27 Nov

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If the bit rate of the digital communication system is 'R' Kbps & the modulation used is 32-QAM, what is the minimum bandwidth required for ISI free transmission?
My understanding & analysis so far:
QAM (a digital-to-analog conversion technique) is a combination of ASK & PSK. The idea behind QAM is to alter two characteristics (amplitude...  more»
0
down vote
favorite
1
If the bit rate of the digital communication system is 'R' Kbps & the modulation used is 32-QAM, what is the minimum bandwidth required for ISI free transmission?
My understanding & analysis so far:
QAM (a digital-to-analog conversion technique) is a combination of ASK & PSK. The idea behind QAM is to alter two characteristics (amplitude & phase) instead of just one to improve the bit rate.
From literature (Data Communications & Networking by Forouzan), the minimum bandwidth required for QAM is same as that of ASK/PSK.
BW for Binary ASK is given by B = (1+d)S, where S is the signal rate.
For 32-QAM bandwidth is:-
B = S = (bit rate)/(bits per signal element) = R/5 KHz
(for 32-QAM no. of symbols per signal element is log2(32) = 5) «less

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K

Kanak 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

In the summer of 2012, in New Delhi, the mean temperature of Monday to Wednesday was 41 degree celsius of Tuesday to Thursday was 43 degree celsius. If the temperature on Thursday was 15% higher than that of Monday, then the temperature in degree celsius on Thursday was______ ?

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Shantanu replied | 24 Nov

Let the temperatures on Monday,Tuesday,Wednesday and Thursday is M,T,W and Th respectively.
The mean temperature of Monday to Wednesday was 41 deg C => (M+T+W)/3 = 41
=> M+T+W = 123 ---(a).
The mean temperature of Tuesday to Thursday was 43 deg C=> (T+W+Th)/3 = 43
=> T+W+Th = 129 ---(b).
(b)-(a) => Th-M = 6 ---(c).
temperature on Thursday...  more»
Let the temperatures on Monday,Tuesday,Wednesday and Thursday is M,T,W and Th respectively.
The mean temperature of Monday to Wednesday was 41 deg C => (M+T+W)/3 = 41
=> M+T+W = 123 ---(a).
The mean temperature of Tuesday to Thursday was 43 deg C=> (T+W+Th)/3 = 43
=> T+W+Th = 129 ---(b).
(b)-(a) => Th-M = 6 ---(c).
temperature on Thursday was 15% higher than that of Monday => Th = 1.15*M ---(d).
From (c) and (d), 0.15 M = 6 => M = 6/0.15 => Th = 1.15*6/0.15 = 46 «less

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Ritu 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

How many roots does the given polynomial have: f(x) = a4 (x power 4) + a3 (x power 3) + a2 (x power 2) + a1 (x) - an with all positive coefficients?

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Sanjeev replied | 30 Nov

4 since its degree is 4

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P

Perl 19 Nov in  GATE Coaching classes, Electronics & Communication(GATE Coaching classes)

Complete the sentence with suitable grammar: Mount Everest is ____ ?

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Siva Naga Raju replied | 22 Nov

Options please. It is an incomplete sentence and can end in different ways without needing much of grammar like "Mount Everest is a mountain"

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Vikas replied | 23 Nov

Tallest mountain on the earth.

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