Question

types of controlling torque

Answer 1

Explanation:

The deflecting torque is produced by utilizing one or more of the following effects of current or voltage:

Magnetic effect

Moving-iron instruments.

Electrodynamic effect

(i) Moving coil instruments,

(ii) Dynamometer type.

Electromagnetic induction effect

induction type instruments.

Thermal effect

Hot-wire instruments.

Chemical effect

Electrolytic instruments.

Electrostatic effect Electrostatic voltmeters