a)
False. As per left hand rule.
b)
speed of an accelerated charge is given by
v = (2qV/m)^0.5
= (2x(4x1.6x10^-19)x48000/(3.15x10^-26))^0.5
= 1396594.5 m/s
c)
r = mv/qB
= 3.15x10^-26x1396594.5 / (4x1.6x10^-19x0.85)
= 0.081m
upvote if helps
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