Question

A galvanometer is a useful device in electric______

a) transformers.
b) generators and motors.
c) meters.
d) electromagnets.

Answer 1

A galvanometer is a useful device in electric meters.

Step-by-step explanation:

Galvanometers are useful devices in electric meters as they allow for the measurement of small electric currents accurately. They play a crucial role in ammeters and voltmeters by providing a

means to measure the current flowing through a circuit.

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Answer 2

A galvanometer is used in electric meters to measure current and voltage. It operates through the deflection of a needle caused by a magnetic field acting on a current-carrying wire. The correct choice is c) meters.

Step-by-step explanation:

A galvanometer is a useful device in electric circuits that can be used to detect and indicate an electric current. The correct answer to the student's question, 'A galvanometer is a useful device in electric______,' is c) meters.

Analog meters, such as voltmeters and ammeters, use a galvanometer to measure electrical quantities. The galvanometer operates on the principle that a current-carrying coil placed within a magnetic field experiences a torque, which causes the coil to rotate and move a needle across a scale - this deflection indicates the magnitude of the current flowing through the circuit.

To use a galvanometer as an ammeter, which measures current, a small resistance is connected in parallel with it, allowing it to handle higher currents. As a voltmeter, which measures voltage, a large resistance is added in series with the galvanometer to measure the potential difference (voltage) across two points in a circuit.