Here
Potential , V = 1 kV = 1000 V
magnetic fiedld , B = 4.5 mT
B = 0.0045 T
a) for the redius
radius of path = sqrt(2 * m * e * V)/(B * e)
radius of path = sqrt(2 * 1.67 *10^-27 * 1.602 *10^-19 * 1000)/(0.0045 * 1.602 *10^-19 )
radius of path = 1.015 m
the radius of path is 1.015 m
b)
for the time period
time period = 2*pi * m/(B * q)
time period = 2pi *1.67 *10^-27/(0.0045 * 1.602 *10^-19)
time period = 1.46 *10^-5 s
the time period of each revolution is 1.46 *10^-5 s
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