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Question

The frequency of generator (AC) is measured using :

A
multimeter
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B
AVO meter
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C
tachometer
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D
speedometer
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Solution

The correct option is B tachometer
Answer: C tachometer
A multimeter is an electronic measuring instrument also known as Volt-Ohm meter that combines several measurement functions in one unit.
AVO meter is a company trademark for a line of multimeter.
A tachometer is a revolution counter which measures the rotation speed of a shaft or disk in rotating machines like generator and motor.
A speedometer measures the instantaneous speed of a vehicle.

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