In a tangent galvanometer, when a current of `10mA` is passed, the deflection is `31^@`.
Channel: Doubtnut
Date: 2020-08-16

In a tangent galvanometer, when a current of `10mA` is passed, the deflection is `31^@`. By what percentage, the current has to be increased, so at to produce a deflection of `42^@`?