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A 25mv, 2mA d’Arsonval movement is to be used in voltmeter whose full scale reading is 100v. The resistance inserted by 100v meter into circuit is ___________(a) 1 * 10^5Ω(b) 1 * 10^6Ω(c) 1 * 10^4Ω(d) 1 * 10^3ΩI have been asked this question at a job interview.Question is from Measuring Voltage and Current in division Simple Resistive Circuits of Electric Circuits

Answer»

The CORRECT ANSWER is (a) 1 * 10^5Ω

Easy explanation: V = iR

R = v/i

= 100/1mA

= 100,000Ω.



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