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A charge + Q is moving upwards verticall...

A charge `+ Q` is moving upwards vertically. It enters a magnetic field directed to the north. The force on the charge will be towards

A

North

B

South

C

East

D

West

Text Solution

Verified by Experts

The correct Answer is:
C
`f=1/(2pisqrt(LC))`
L' = L + 0.2 L = 1.2 L
C' = C + 0.2 C = 1.2 C
`therefore f'=f/1.2 = 5/(6f)`
% change = `((5/6-1)f)/fxx100`
`="-100"/6 ~~ -16.67%`
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