Measurement and Instrumentation
When using ohmmeter, applied voltage is to be disconnected from the circuit because

Current will decrease resistance
The ohmmeter has its own internal battery
None of these
Voltage source will increase resistance

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

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