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In moving coil galvnometer a current f 2...

In moving coil galvnometer a current f 2A for radial magnetic field of ` 4xx 10^(-3) Wb/m^(2)` produces some deflection. FI the field is doubled by keeping all other quantities same, the current for the same deflection will be

A

0.5 A

B

0.041666666666667

C

0.125

D

1 A

Text Solution

Verified by Experts

The correct Answer is:
D
As, `l = (C )/(nAB) phi`
or `l prop (1)/(B)`
As field becomes double, deflection becomes half ie, current is half i.e., 1 A.
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