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In a region of space, a uniform magnetic field B exists in the y-direction. A proton is fired from the origin, with its initial velocity v making a small angle α with the y-direction in the yz-plane. In the subsequent motion of the proton,(a) its x-coordinate can never be positive (b) its x- and z-coordinates cannot both be zero at the same time (c) its z-coordinate can never be negative (d) its y-coordinate will be proportional to the square of its time of flight |
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Answer» Correct Answer is: (a) its x-coordinate can never be positive |
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