A homogeneous electric field $E$ and a uniform magnetic field $\mathop B\limits^ \to $ are pointing in the same direction. A proton is projected with its velocity parallel to $\mathop E\limits^ \to $. It will
A
Go on moving in the same direction with increasing velocity
B
Go on moving in the same direction with constant velocity
C
Turn to its right
D
Turn to its left
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A
Go on moving in the same direction with increasing velocity
a (a) Here magnetic force is zero, but the velocity increases due to electric force.
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