Verified Solution • 2025–26 Session moderate

QJEEM25Ph4e59: JEE Main 2025 Physics - Class 12 JEEM25Ph4e59 Solution: Given below are two statements. One is labelled as Assertion…

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 :

Multiple Choice Options

  • A (A) is true but (R) is false
  • B Both (A) and (R) are true and (R) is the correct explanation of (A)
  • C Both (A)(\mathbf{A}) and (R)(\mathbf{R}) are true but (R)(\mathbf{R}) is NOT the correct explanation of (A)
  • D (A) is false but (R) is true

Step-by-Step Verified Solution

F―=q(v―×B―)F―=0 V―‖B―θ=0 or 180

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