JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyRecall

JEE Main 16 March 2021, Shift 2, Physics Q9

Question 9 of 90 in this shift, Physics question 9 of 30, Section A.

A charge Q is moving

\vec{dl}

distance in the magnetic field

\vec{B}

. Find the value of work done by

\vec{B}

(1)1
(2)ZeroOfficial answer
(3)Infinite
(4) $-1$

Official answer

Option 2

NTA final key.

Chapter: Moving Charges and Magnetism
Topic: Lorentz Force
Idea tested: Work Done by Magnetic Force

Same idea in other shifts

Asked 3× in all

24 Jun 2022, Shift 1 · Q32Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : In an uniform…EasyAssertion–reason
29 Jun 2022, Shift 2 · Q44Given below are two statements : Statement I: The electric force changes the speed of the charged particle and hence changes its kinetic…EasyTwo statements

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.