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

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

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Measurement and Instrumentation
In measurement system, the function of the signal manipulating elements is to

 change the magnitude of the input signal while retaining its identity.
 to perform non liner operation like clipping filtering, chopping and clamping.
 to perform linear operation like addition and multiplication.
 change the quantity under measurement to an analogues signal.

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