Measurement and Instrumentation
Which of following is not correct?

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

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Measurement and Instrumentation
It can be stated that

CT operates with considerably lower flux density than a PT
CT operates with a higher flux density than PT
CT operates at almost the same flux density as a PT
No generalisation can be made with regard to the flux densities in CT and PT

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Measurement and Instrumentation
Consider the following statement - 1. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the current coil. 2. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the voltage coil circuit.

 Both 1 and 2 are false.
 Both 1 and 2 are true.
 1 is true but 2 is false.
  1 is false but 2 is true.

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