A tangent galvanometer gives a deflection of `30^(@)` whewn a current of 250 mA is
Channel: Doubtnut
Date: 2020-08-23

A tangent galvanometer gives a deflection of `30^(@)` whewn a current of 250 mA is passed through its coil. If the radius of the coil is 8 cm and `B_(H)=2.5xx10^(-5)Wbm^(-2)`. Find the length of the wire used in winding the coil.