Question

In a DVM, a signal conditioning circuit is used ________

(a) to bring current to a suitable limit

(b) to bring resistance to a suitable limit

(c) to bring resistance to s suitable limit

(d) to bring voltage to a suitable limit

The question was asked in an international level competition.

The origin of the question is Digital Voltmeters in division Electronic Instruments of Electrical Measurements

Answer 1

Right choice is (d) to bring voltage to a suitable limit

Easiest explanation: In a DVM, signal conditioning circuit is used. It converts the input signal into an voltage of suitable limit. This is done so that the voltmeter can read the magnitude of the signal correctly.