The tangent galvanometer is a device used for measuring current. It works on the principle of tangent law. A magnetic needle suspended at a point where there are two crossed fields at right angles to each other will come to rest in the direction of the resultant of the two fields.
The tangent galvanometer is a type of galvanometer having a vertical coil of wire with a horizontal magnetic needle at its centre. The current to be measured is passed through the coil and produces a proportional magnetic field which deflects the needle.
