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In T.G., a deflection of 45^@ is obtaine...

In T.G., a deflection of `45^@` is obtained when a current of 173 m A is passed through it. The deflection in T.G., is `30^@`,when current thorugh is

A

100mA

B

150mA

C

300mA

D

600mA

Text Solution

Verified by Experts

The correct Answer is:
A
`theta _1=45^@, I_1=173m A, theta_2=30^@, I_2=?`
For tangent galvanometer ,
`Iprop tant theta`
`therefore (I_2)/(I)=(tan theta_2)/(tan theta_1)`
`l_2 = (tan 30)/(tan 45 )xxI_1`
`= (1)/(sqrt(3))xx173`
`= 100mA`.
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