Measurement and Instrumentation
A moving coil ammeter has a uniform scale with 50 division and gives a full scale reading 10 A. The instrument can read up to (1/5)th of a scale division with a fair degree of certainty. What is the resolution of the instrument in mA?

 25 mA.
  40 mA.
 80 mA.
 50 mA.

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Measurement and Instrumentation
Assertion(A): A low power factor wattmeter has special constructional features to ensure accurate measurment. Reason(R): Extension of wattmeter range in DC circuit can be easily done by using current and potential transformer

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

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Measurement and Instrumentation
The measurment of very low and very high frequencies is invariably done using a frequency counter in which one of the following?

 Frequency and period measurment modes, respectively.
 Period measurment modes only.
 Frequency measurment modes only.
  Period and frequency measurement modes respectively.

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