Electrodynamics — CSIR Net PYQ (Question 2)

A Electrodynamics previous-year question (PYQ) from Electromagnetism (CSIR Net). Read the question, check the correct answer, then practise the full topic.

Question 2 of 14 · 3.5 marks

A conducting circular disc of radius $r$ and resistivity $\rho$ rotates with an angular velocity $\omega$ in a magnetic field $B$ perpendicular to it. A voltmeter is connected as shown in the figure below.
Assuming its internal resistance to be infinite, the reading on the voltmeter

1. 1depends on $\omega ,B,r$ and $\rho$
2. 2depends on $\omega ,B$ and $r$, but not on $\rho$
3. 3is zero because the flux through the loop is not changing
4. 4is zero because a current flows in the direction of $B$

Correct answer: Option 2

About this question

This Electrodynamics PYQ is part of the Electromagnetism section of CSIR Net. Browse more Electrodynamics questions or join the PhysicsByAaryan live batch for full conceptual coverage.