JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 9 April 2024, Shift 2, Physics Q44

Question 44 of 90 in this shift, Physics question 14 of 30, Section A.

A proton and a deutron (

q=+e

m=2.0

u) having same kinetic energies enter a region of uniform magnetic field

\vec{B}

, moving perpendicular to

\vec{B}

. The ratio of the radius

r_d

of deutron path to the radius

r_p

of the proton path is :

(1) $\sqrt{2}:1$ Official answer
(2) $1:\sqrt{2}$
(3) $1:2$
(4) $1:1$

Official answer

Option 1

NTA final key.

Chapter: Moving Charges and Magnetism
Topic: Lorentz Force
Idea tested: Trajectory Radii Ratio for Same Kinetic Energy

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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 42 of the 174 JEE Main shifts held from 2017 to 2026.