With an ohmmeter connected across a 10-ohm resistor, what will the ohmmeter read?

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Enhance your understanding of the fundamentals of electricity with the AMT General Exam. Study with multiple-choice questions crafted to improve your knowledge and confidence. Prepare effectively for your success!

Multiple Choice

With an ohmmeter connected across a 10-ohm resistor, what will the ohmmeter read?

Explanation:
An ohmmeter determines resistance by applying a small current (from its internal battery) and measuring the resulting voltage, or vice versa, to calculate R = V/I. It shows the resistance between its two leads, assuming the circuit is unpowered and there are no additional parallel paths. When the leads are across a single 10-ohm resistor, the only path is through that resistor, so the meter reads 10 ohms. If the circuit were open, the reading would be infinite; if the leads were shorted, it would read near zero; adding other components would change the reading accordingly. Always measure resistance with power removed.

An ohmmeter determines resistance by applying a small current (from its internal battery) and measuring the resulting voltage, or vice versa, to calculate R = V/I. It shows the resistance between its two leads, assuming the circuit is unpowered and there are no additional parallel paths. When the leads are across a single 10-ohm resistor, the only path is through that resistor, so the meter reads 10 ohms. If the circuit were open, the reading would be infinite; if the leads were shorted, it would read near zero; adding other components would change the reading accordingly. Always measure resistance with power removed.

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