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

 3.53 V.
 4.54 V.
 5 V.
 4.38 V.

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Measurement and Instrumentation
The measurement of a quantity

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

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Measurement and Instrumentation
Assertion (A): A hot wire ammeter has a cramped scale. Reason (R): The heat is proportional to square of current.

 A is false and R is ture.
 Both A and R are true and R is not correct explanation of A.
 Both A and R are true and R is correct explanation of A.
 A is ture and R is false.

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