Physics · 2025
JEE Main · 24 January 2025, Shift 2 · Q35
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A electron in a certain…
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : A electron in a certain region of uniform magnetic field is moving with constant velocity in a straight line path.
Reason (R) : The magnetic field in that region is along the direction of velocity of the electron.
In the light of the above statements, choose the correct answer from the options given below :
Official answer
From NTA’s final answer key for this paper.
(3)
Both (A) and (R) are true and (R) is the correct explanation of (A)
More from Magnetic Field and Forces
- An infinitely long straight wire carrying current I is bent in a planer shape as shown in the diagram. The radius of the circular part is r. The…2026
- A proton is moving undeflected in a region of crossed electric and magnetic fields at a constant speed of 2 × 10^5 ms^-1. When the electric field is…2025
- An infinite wire has a circular bend of radius a, and carrying a current I as shown in figure. The magnitude of magnetic field at the origin O of the…2025
- A long straight wire of a circular cross-section with radius ' a ' carries a steady current I. The current I is uniformly distributed across this…2025
- Two identical circular loops P and Q each of radius r are lying in parallel planes such that they have common axis. The current through P and Q are I…2026
- A tightly wound long solenoid carries a current of 1.5 A. An electron is executing uniform circular motion inside the solenoid with a time period of…2025
- A current carrying solenoid is placed vertically and a particle of mass m with charge Q is released from rest. The particle moves along the axis of…2026
- In a moving coil galvanometer, two moving coils M_1 and M_2 have the following particulars: R_1=5 Ω, N_1=15, A_1=3.6 × 10^-3 m^2, B_1=0.25 T; R_2=7…2025
JEE Main 2025 Physics question, with the answer from NTA’s final answer key. Where our answers come from.