Measurement and Instrumentation
A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in figure. The measured voltage will be

 4.54 V.
 4.38 V.
 5 V.
 3.53 V.

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Measurement and Instrumentation
A DC potentiometer is the best means available for the measurement of DC voltage because

  It is based on null balance technique.
 None of above.
 The precision in measurment is independent of the type of the defector used.
 It is possible to standardize before a measurement is undertaken.

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Measurement and Instrumentation
The measurement of a quantity

 is a comparison of an unknown quantity with known quantity.
 none of these.
 is a comparison of an unknown quantity with another quantity.
  is a comparison of an unknown quantity with standard.

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