How is a voltmeter connected to a component to measure applied voltage?

How is a voltmeter connected to a component to measure applied voltage?

• A. In series
• B. In parallel
• C. Both in series and parallel
• D. Directly to ground

Answer: (B)

A voltmeter is designed to measure the voltage across a component, meaning it needs to be connected in parallel with that component. This configuration allows the voltmeter to capture the potential difference (voltage) between the two points it is connected to without significantly altering the current flow through the circuit. When connected in parallel, the voltmeter shares the same two nodes as the component, enabling it to accurately measure the voltage drop across it. This parallels the nature of how voltage is defined in electrical circuits: as the difference in electric potential between two points. If a voltmeter were connected in series instead, it would become part of the circuit path, influencing the current flow and potentially leading to inaccurate readings and circuit behavior. This is a fundamental concept in electrical engineering and circuit analysis, reinforcing the importance of correct voltmeter placement to ensure reliable measurements.

A voltmeter is designed to measure the voltage across a component, meaning it needs to be connected in parallel with that component. This configuration allows the voltmeter to capture the potential difference (voltage) between the two points it is connected to without significantly altering the current flow through the circuit.

When connected in parallel, the voltmeter shares the same two nodes as the component, enabling it to accurately measure the voltage drop across it. This parallels the nature of how voltage is defined in electrical circuits: as the difference in electric potential between two points.

If a voltmeter were connected in series instead, it would become part of the circuit path, influencing the current flow and potentially leading to inaccurate readings and circuit behavior. This is a fundamental concept in electrical engineering and circuit analysis, reinforcing the importance of correct voltmeter placement to ensure reliable measurements.