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Question

A charged particle of charge Q and mass m moves with velocity v in a circular path due to transverse magnetic field B, then its frequency is

A
QB2πm
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B
QvB2πm
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C
QmvB2π
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D
vB2πQm
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Solution

The correct option is A QB2πm
Magnetic Field =B
Centrifugal Force = mv2R
Magnetic Force =QvB
mv2R=QvB
v=QBRm
frequency = v2πR=QB2πm
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