What is the condition for using a multiplier in A.C. voltmeters?(a) by using ac supply(b) by maintaining a uniform impedance(c) by maintaining a uniform frequency(d) by using a galvanometerThis question was addressed to me in an interview.This intriguing question comes from Shunts and Multipliers in section Extension of Instrument Ranges of Electrical Measurements

What is the condition for using a multiplier in A.C. voltmeters?(a) by

1.	What is the condition for using a multiplier in A.C. voltmeters?(a) by using ac supply(b) by maintaining a uniform impedance(c) by maintaining a uniform frequency(d) by using a galvanometerThis question was addressed to me in an interview.This intriguing question comes from Shunts and Multipliers in section Extension of Instrument Ranges of Electrical Measurements
Answer» The correct answer is (c) by maintaining a uniform frequency Easy explanation: A multiplier can be used for A.C. VOLTMETERS. The condition to be satisfied is that the total IMPEDANCE of the VOLTMETER and the multiplier CIRCUIT must be constant for a wide range of frequencies.

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