Question

_______ is a device which makes use of mutual induction for stepping up or down an alternating e.m.f.

Options

A
Sonometer
B
Transformer
C
Ammeter
D
Voltmeter
E
Potentiometer

Explanation

Attached below is the answer to the question above:

SONOMETER:The device that is used for demonstrating the relationship between the frequency of the sound that is produced by the string when it is plucked and the tension, length, and mass per unit length of the string.

A transformer is an electrical device that uses the principle of electromagnetic induction to transfer energy from one electric circuit to another. It is designed to either increase or decrease AC voltage between the circuits while maintaining the frequency of the current.

AMMETER :An ammeter is an instrument used to measure the current in a circuit.

VOLTMETER :A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel

POTENTIOMETER:A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.