Show that in a tangent galvanometer the percentage error in the measurment of current is a minimum when the deflection is `45^(@)`.

Show that in a tangent galvanometer the percentage error in the measurement of current is minimum when the deflection is 45^(@) .

Tangent galvanometer measure

Show that percentage error in the measurement of m/B by a deflection magnetometer is minimum when deflection is near about 45^(@) .

Tangent galvanometer is used to measure

The error in measuring the curent with tangent galvanometer is minimum when the deflection is about

Show that the percentage error in the measurement of resistance by a metre bridge is minimum when the null point is near about the centre of the wire.

Show that the percentage error in the measurement of resistance by a metre bridge is minimum when the null point is near about the centre of the wire.