A voltmeter to measure the voltage across a load should be connected

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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

A voltmeter to measure the voltage across a load should be connected

Explanation:
To measure the voltage across a load, connect the voltmeter in parallel with the load. A voltmeter has very high internal resistance, so it draws almost no current and reads the same potential difference that appears across the load’s terminals without altering the circuit. If you place the voltmeter in series or between the source and load, it would become part of the circuit, change the current flow, and skew the voltage across the load. Connecting across the source would measure the source voltage rather than the load voltage. In parallel with the load is the correct approach.

To measure the voltage across a load, connect the voltmeter in parallel with the load. A voltmeter has very high internal resistance, so it draws almost no current and reads the same potential difference that appears across the load’s terminals without altering the circuit. If you place the voltmeter in series or between the source and load, it would become part of the circuit, change the current flow, and skew the voltage across the load. Connecting across the source would measure the source voltage rather than the load voltage. In parallel with the load is the correct approach.

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