Question 130Electricity & Electronics - Assistant Engineer

The correct answer is B) placing the test leads across a voltage source to measure voltage while in the resistance mode. Placing the multimeter test leads across a voltage source while in the resistance mode can potentially damage the multimeter. This is because the resistance mode is designed to measure the resistance of a circuit or component, not the voltage. Applying a voltage to the resistance mode can overload the multimeter's internal circuitry and cause damage. The other answer choices do not pose the same risk of damaging the multimeter. Measuring current in voltmeter mode (A), measuring resistance in voltmeter mode (C), and measuring resistance in ammeter mode (D) are generally safe practices, as long as the multimeter is set to the appropriate mode.