APFIVE Magnetic Force on Charges in a Conductor
A conducting rod of length L moves with velocity v on conducting rails, perpendicular to a uniform magnetic field B. If the rod’s velocity is instantaneously doubled, what is the effect on the magnetic force acting on the free charges in the rod?
A
The force doubles and remains at that value
B
The force quadruples
C
The force remains the same
D
The force doubles initially but then increases further
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