Measurement and Instrumentation
Assertion (A) : Precision is a necessary prerequisiteof accuracy. Reason (R) : Precision guarantees accuracy.

 A is true but R is false
 Both A and R are true and R is the correct explanation of A
 Both A and R are true but R is NOT the correct explanation of A
 A is false bur R is true

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Measurement and Instrumentation
Which of following is not correct?

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

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