UPTET Feb 2014, q106

0. An electric charge q moves with a constant velocity v parallel to the lines of force of a uniform magnetic field B. Force on charge is

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Option : C
Explanation : We know that, F = qvBsin θ;
where, q = Charge
v = Velocity of charge
B = Magnetic field
Q = Angle between magnetic field and motion of charge = 0
So, F = qvBsin0° = 0.

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