A TG has 50 turns each of diameter 15 cm...

A TG has 50 turns each of diameter `15 cms`. When a certain current is passed through its coil, the deflection of the needle is `45^(@)`. If `B_H)=4 pi muT` the value of current is

`77.44mA`

`44.77mA`

`74.74mA`

`60 mA`

Text Solution

Verified by Experts

The correct Answer is:

`I=((2r)B_(H))/(mu_(0)n).tan theta`

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