Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : An 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 :

[JEE Main 2025, 24 Jan (Shift 2)]

Question

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : An 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 :

[JEE Main 2025, 24 Jan (Shift 2)]

YESPYQ · Accepted Answer

Correct answer: c) Both (A) and (R) are true and (R) is the correct explanation of (A). Both (A) and (R) are true and (R) Is the correct explanation Of (A) $\overset{⇢}{\mathrm{F}}=\mathrm{q}(\overset{⇢}{\mathrm{v}}\times \overset{⇢}{\mathrm{B}})$ $\overset{⇢}{\mathrm{F}}=0$ $\overset{⇢}{\mathrm{V}}‖\overset{⇢}{\mathrm{B}}$ $\theta =0\text{ or }180$

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) …

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