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Question

A particle having charge 6C enters perpendicularly in a uniform magnetic field of strength 100T with a momentum of
36kg m/s. The radius of the circular path of the particle is
[Take μ0=4×107Tm/A]

A
60 cm
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B
6 m
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C
6 cm
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D
6 mm
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Solution

The correct option is C 6 cm
Charge, q = 6 C
Magnetic field, B = 100 T
Momentum of the charged particle, mv = 36 kg m/s
Angle between velocity and magnetic field θ=90
Let r be the radius of the circular path.
Now,mv2r=q¯vׯB=qvB sin 90=qvb
r=mvqB=366×100
= 0.06 m
= 6 cm
Hence, the correct answer is option (3).

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