When using an ohmmeter to measure resistance in a circuit, a. the power in the circuit being tested...

Question

When using an ohmmeter to measure resistance in a circuit,

a. the power in the circuit being tested must be off.

b. the power in the circuit being tested must be on.

c. the power in the circuit being tested may be on or off.

d. the power in the circuit being tested should be turned on after the leads are connected.

David · Accepted Answer

Solution: 
a. the power in the circuit being tested must be off. 
Ohmmeters work by passing a small current through the component and measuring the voltage produced. 
If you try this with the component connected into a circuit with a power supply,

When using an ohmmeter to measure resistance in a circuit, a. the power in the circuit being tested must be off. b. the power in the circuit being tested must be on. c. the power in the circuit being...

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