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# Engineering Entrance Coaching Updates

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If there is a electric set up such that A and B are respectively positive and negative terminals of the... read more

If there is a electric set up such that A and B are respectively positive and negative terminals of the cell and a resistor PQ is inserted in the circuit. My question is how the current flows between A and P yet there is no Potential difference between A and P?

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Ankit Chauhan

Experienced Maths and Science Tutor

It is because when you insert a resistor, or when a conductor (resistors are conductors) is connected to a voltage source such as a battery, the negative terminal will present an opposing electrostatic force the conductor as well as have a ready supply of additional electrons. This field will repel electrons... read more

It is because when you insert a resistor, or when a conductor (resistors are conductors) is connected to a voltage source such as a battery, the negative terminal will present an opposing electrostatic force the conductor as well as have a ready supply of additional electrons. This field will repel electrons in the conductor and exert a force on them and will attempt to inject fresh electrons into the conductor. At the opposite end, where the conductor is connected to the positive terminal of the voltage source, a force exists to pull electrons from the conductor.

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Lesson Posted on 03 Jul Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Advanced Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Mains Coaching +1 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/IIT JEE Integrated Coaching less

Ashani Ray

I am All India Rank (AIR) holder in all competitive examinations that I appeared, including: - IIT JEE...

Let us solve Irodov problem 1.1 on Kinematics. The problem states: A motorboat going downstream overcame a raft at a point A; τ=60 min later it turned back and after sometime passed the raft at a distance l=6.0 km from point A. Find the flow velocity assuming the duty of the engine to be constant. To... read more

Let us solve Irodov problem 1.1 on Kinematics.

The problem states:

A motorboat going downstream overcame a raft at a point A;  τ=60 min later it turned back and after sometime passed the raft at a distance l=6.0 km from point A. Find the flow velocity assuming the duty of the engine to be constant.

To solve this problem most efficiently we will be using the following concepts:

1. Reference Frames in Kinematics

2. Vectors

Let us now see how to approach the problem by looking at a presentation I created :

(The video is in Bengali)

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Answered on 02 Jul Exam Coaching/Engineering Entrance Coaching/GATE Coaching/Biotechnology

From the knowledge of control systems; what is exactly ORDER of any physical system or any electrical... read more

From the knowledge of control systems; what is exactly ORDER of any physical system or any electrical system or mathematics perspective?

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Sandeep

Tutor

It depends on how many state variables are present in the system. For example consider a series RLC circuit, there are two energy storage elements or elements which has memory. So the order of the system is two. If there are n such independent elements, the order of the system will be n. If the number... read more

It depends on how many state variables are present in the system. For example consider a series RLC circuit, there are two energy storage elements or elements which has memory. So the order of the system is two. If there are n such independent elements, the order of the system will be n. If the number of energy storing elements are not independent, the order of the system can be less than n.

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Answered on 25 Jun Exam Coaching/Engineering Entrance Coaching/GATE Coaching/Mechanical

Avantika P.

Passionate professional who loves teaching

The moment is usually related to the analysis of forces on a beam often in non-rotational situations. Torque is associated where there is axle or point of the pivot to revolve.
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Lesson Posted on 01 Apr Exam Coaching/Engineering Entrance Coaching/GATE Coaching/Civil

Phani J V

Basics,concept,practice is my motto, exam point of teaching, personal care of student is my interest,encourage...

Following are the differences between the Pelton wheel, Francis and Kaplan turbine: Pelton wheel is an impulse turbine where static pressure head of water is converted into mechanical energy. On the other hand, Francis and Kaplan's turbines are reaction turbines where dynamic pressure head of water... read more

Following are the differences between the Pelton wheel, Francis and Kaplan turbine:

1. Pelton wheel is an impulse turbine where static pressure head of water is converted into mechanical energy. On the other hand, Francis and Kaplan's turbines are reaction turbines where dynamic pressure head of water is converted into mechanical energy. In impulse turbine change in momentum gives the force applied on the buckets hence work done on the runner. But in reaction turbines blades are designed as a converging passage (in converging passage pressure of water decreases and velocity increases) between the blades, so pressure energy is converted to mechanical energy.
2. Impulse turbine is used where a high head is available. Francis turbine is for the medium head, and Kaplan is for the low head.
3. Similarly, Specific speed is inversely related to heads. So, for impulse turbine, specific speed is low, for Francis medium and Kaplan it is high.

Pelton wheel is used where a high head is available because as I said in the first point static pressure head of water is used in the Pelton wheel.

Francis turbine is a mixed flow type reaction turbine where both static and dynamic pressure head of water is used. So it is used where the medium head is available.

Kaplan turbine is an axial flow reaction turbine where the dynamic head of water is used. So it is used where the low head is available.

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what is the best coaching institute for tofle in hyderabad i mean in qualified persentage

Naveen Alate

Computer Course Trainer

First Academy - IELTS, GRE, SAT, OET, PTE Coaching in Ameerpet, Hyderabad
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Explain condition of total internal reflection with all necessary diagrams

Sunil Yadav

Physics & Mathematics Expert for JEE Mains & Advanced with 8 yrs experience

total internal reflection occurs when light travels from an optically denser medium to a rarer medium. For this, the angle of incidence should be higher than the critical angle (the angle for which angle of refraction is 90 degrees).
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Lesson Posted on 18/07/2017

Ajay A S

Super -10 iit -jee batch My teaching experience 9 years in various top most institute and mentor of...

I'll give you some options which are decently good and not that difficult to get into: Vit Vellore (not Chennai or some other branch): Own entrance exam, entry by paying more also possible, very good campus and infrastructure, good placements (3–4lakh jobs on average like any other... read more

I'll give you some options which are decently good and not that difficult to get into:

1. Vit Vellore (not Chennai or some other branch): Own entrance exam, entry by paying more also possible, very good campus and infrastructure, good placements (3–4lakh jobs on average like any other private university but almost guaranteed job), too many students, decent reputation. (It is worth if you get admission in first, second or third category at most in counselling, which would cost less than 20 lakhs for 4 years. Paying more for a btech is not worth it.)
2. Manipal (main campus not Jaipur or Sikkim): Similar to VIT in most aspects
3. Shiv Nadar University Noida: Relatively new, aptitude based entrance test along with PCM questions, no back door entry (85% in pcm or 120+ in jee for eligibility) so crowd won't be that undeserving, decent placements as it is new (Amazon Flipkart come, Dell cognizant HCl etc recruit in large numbers), very good campus and infrastructure, decent faculty for Cse(other streams like electrical have very good faculty), unique multidisciplinary curriculum, option for minor in any other stream (even non engineering stream like economics).
4. Pes University Bangalore: Only good for Cse, good placements as in IT hub Bangalore, decent campus, own aptitude based entrance test along with PCM questions.
5. LNMIIT jaipur, BITS Pilani, Thapar are also private but entry is difficult as they are the best. (Thapar entry is comparatively easy if you are from Punjab)
6. If you don't get into any of these then Amity, Chandigarh University, SRM Chennai are okay-ish options only for CSE. Entry is easy. (Management quota also applicable)
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Lesson Posted on 20/04/2017 Tuition/BTech Tuition Tuition/BTech Tuition/BTech Mechanical Engineering Exam Coaching/Engineering Entrance Coaching/GATE Coaching +1 Exam Coaching/Engineering Entrance Coaching/GATE Coaching/Mechanical less

Ashwani

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Answered on 18/04/2017 Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching Exam Coaching/Engineering Entrance Coaching/IIT JEE Coaching/Chemistry

U.K. Akshay

Math Expert Educator and Spoken English Trainer with 12 Years Experience of Teaching and Educating.

You can visit my profile where I have attached all my written documents topic wise for chemistry.
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