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Input impedance of a voltmeter is ___________(a) high(b) low(c) medium(d) zeroI have been asked this question at a job interview.My question is from Consideration in Selecting Voltmeter topic in portion Electronic Instruments of Electrical Measurements |
Answer» RIGHT answer is (a) high Explanation: In ORDER to prevent the loading effect in a voltmeter, the INPUT impedance is maintained as high as possible. It MUST be maintained HIGHER than the impedance of the circuit being used. |
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