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Question

A particle having a charge of 2.0×108 C and a mass of 2.0×1010 g is projected with a speed of 2.0×103 m s1 in a region having a uniform magnetic field of 0.10 T. The velocity is perpendicular to the field. Find the radius of the circle formed by the particle and also the time period.

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Solution

q=2.0×106C,

B=0.10 T

m=2.0×1010 kg

=2×1013 kg,

V=2.0×103 m/s

Using qVB = mV2r

So, radius r=mVqB=20 cm

T=2πrv

So, T=6.28×104s


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