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Noise is a function of _________

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Noise is a function of _________

(a) voltage

(b) current

(c) bandwidth

(d) frequency

I had been asked this question in quiz.

This is a very interesting question from Consideration in Selecting Voltmeter in section Electronic Instruments of Electrical Measurements

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Best answer
Correct answer is (c) bandwidth

For explanation I would say: Noise in general depends on the value of the bandwidth. Voltmeter having a large bandwidth takes up more noise. Usually, the sensitivity of a voltmeter is 1mV for a bandwidth of 10Hz – 10MHz.

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