A moving coil instrument having a resistance of 10 Ω, gives a full-scale deflection when the current is 10 mA

A moving coil instrument having a resistance of 10 Ω, gives a full-scale deflection when the current is 10 mA

Q. A moving coil instrument having a resistance of 10 Ω, gives a full-scale deflection when the current is 10 mA. What should be the value of the series resistance, so that it can be used as a voltmeter for measuring potential difference up to 100 V?

(A) 9 Ω

(B) 99 Ω

(C) 990 Ω

(D) 9990 Ω

Ans: 9990 Ω

Solution:

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