Measurement and Instrumentation
Which of following is not correct?

  An electronic voltmeter draw appreciable current from the source.
 Voltmeter should have very high resistance.
 A shunt should have a very low resistance.
 An ammeter should have a very low resitance.

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Measurement and Instrumentation
In AC circuits, the connection of measuring instruments cause loading effect errors which may effect

 magnitude, phase and waveform of the quantity being measured.
 only the magnitude of the quantity being measured.
 only phase of the quantity being measured.
 both of above.

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