Question 160Electricity & Electronics - QMED

The correct answer is A) The resistor's circuit must be de-energized and at least one end of the resistor isolated by disconnecting. This is the correct answer because when using an ohmmeter to test a resistor, the circuit must be de-energized and at least one end of the resistor must be disconnected from the circuit. This is necessary to isolate the resistor from the rest of the circuit and ensure an accurate resistance reading. If the circuit is energized, the ohmmeter could be damaged, and the reading would not be accurate. The other answer choices are incorrect because: B) Correct polarity is not necessary when testing a resistor, as the ohmmeter does not rely on the flow of current in a specific direction. C) The ohmmeter must be connected in parallel with the resistor, not in series. D) Twisting the meter leads is not necessary when testing a resistor.