Measurement and Instrumentation
In AC circuits, the connection of measuring instruments cause loading effect errors which may effect

 only phase of the quantity being measured.
 only the magnitude of the quantity being measured.
 both of above.
 magnitude, phase and waveform of the quantity being measured.

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

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