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Motion of a moving electron is not affec...

Motion of a moving electron is not affected by

A

An electric field applied in the direction of motion

B

Magnetic field applied in the direction of motion

C

Electric field applied perpendicular to the direction of motion

D

Magnetic field applied perpendicular to the direction of motion

Text Solution

Verified by Experts

The correct Answer is:
B
When `vecv || vecB (theta = 0^(@))` , then `vecF_(m) = q(vecv xx vecB) implies F_(m) = qv B sin theta = qvB (0) = 0`
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