Connecting Students in 221 Countries

Search *

Video Lectures

Video Lecture Advance Illustration My Sequence My Bookmark

High School/JEE/NEET/IPhO Physics | 17-19 Yrs

Basic Tools

Mechanics

Heat & Thermodynamics

Oscillation & Waves

Properties of Matter

Gravitation

Electrostatics

Electric Current & Circuits

Magnetic Effects

Optics

Modern Physics

Semiconductors

Communication Systems

thanks for teaching sir

4 years ago by Satish

Post your answer here

sir in this y is equal to r /tan theta ….u have take theta at diff pt

4 years ago by

Post your answer here

Sir, shouldn't r = y.tan ?? In the above video, you wrote y = r.tan ?

6 years ago by Ivan Koshy

Post your answer here

Sir, if I take y=r cot(theta) , What is wrong in taking this?

7 years ago by Amit Vikram Raj

Ans 1 ->

well then you will get UoI/4piR * integration of ln(cossecQ cot Q) limits from 0 to pi... probably going to yield the same answer in a more complicated way

7 years ago by ABHISHEK SHANKAR

Post your answer here

sir how u come 2 knw that this particular substitution is required ???

7 years ago by rameh hooyex

Ans 1 ->

well you can see the expressions differentiation lies in the numerator like of the form f '(x) / f(x) and plus it is in the form of 1/x^2 a^2... you might have studied in integration that in such cases you first substitute x as AtanQ and see the expression that to yields... it is like a hit and trial method which in most cases is successful

7 years ago by ABHISHEK SHANKAR

Post your answer here

let y=rtan0 but sir i hope that it is y=r/tan0 by diagram shown

8 years ago by Devendra singh

Ans 1 ->

Here I have taken y=r tanT as a trigonometric substitution not the relation from the figure... consider this separately...

8 years ago by Physics Galaxy

Post your answer here

sir , please check the calculation once..(r=ytan(teta) )

10 years ago by ab vishal

Ans 1 ->

All calculations in this video are correct... theta which I have used in first step of sin(theta) is the one which is shown in figure and the theta which I have used for integration is just a substitution... you can see that further I am using at y = inf, theta will become pi/2 and theta in figure will approach to zero... I think now you have got it...

10 years ago by Physics Galaxy

Post your answer here

Hello Sir, Please check the tan theta formula again because r/y = tan theta then how come y = r tan theta??? Please check it again sir.....

10 years ago by Dr.Madhu Sharma

Ans 1 ->

In this analysis I am using y = r tan (theta) as trig substitution for integration it is not related to the diagram... pl check it carefully... its correct...

9 years ago by Physics Galaxy

Log In with by just Once Click -

OR

OR
Log In with your mail ID -
E-Mail:	Enter correct email id. Enter your email id.
Password:	Enter your password.

	Forgot Password ? Click here New User ? Click here

OR

OR

Video Lectures

High School/JEE/NEET/IPhO Physics | 17-19 Yrs

Share this with your friends :

Post your question related to above video lecture

Post your answer here

Post your answer here

Post your answer here

Post your answer here

Post your answer here

Post your answer here

Post your answer here

Post your answer here