The device used to detect the direction of an electric current in a circuit is called a

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Inverter

Electric generator

Electric motor

Galvanometer

answer is D.

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Detailed Solution

The device used to detect the direction of an electric current in a circuit is called a galvanometer.
The deflection on the galvanometer indicates the direction of the current in that circuit. Therefore, the instrument that can detect the direction of the flow of current is a galvanometer.
It is a sensitive device that is used to detect very low currents. It works based on the principle that a coil placed in a uniform magnetic field experiences a torque when an electric current is set up. The deflection of the coil of the galvanometer is determined by a pointer attached to it, moving on the scale.

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