How do you measure voltage in a circuit?

• A. By connecting the meter in series with the circuit
• B. By connecting the meter parallel with the volt being measured
• C. By connecting the meter directly to the power source
• D. By using an ammeter in the circuit

Answer: (B)

To measure voltage in a circuit accurately, the meter must be connected in parallel with the component or section of the circuit where the voltage is being measured. This is because voltage is defined as the potential difference between two points in a circuit. Connecting the meter in parallel allows it to measure this potential difference directly, without affecting the circuit itself.

When connected in parallel, the meter can capture the voltage drop across the component while maintaining the flow of current through the rest of the circuit. This ensures an accurate reading of the voltage, as the meter does not introduce additional resistance into the path of the current.

Connecting the meter in series, as mentioned in another option, would not yield a voltage measurement; instead, it would disrupt the circuit and measure the total current flowing through the circuit. Similarly, connecting the meter directly to the power source could provide an incorrect reading unless specifically calibrated to do so, and using an ammeter would not provide a voltage measurement but rather a current measurement. Thus, the correct method is to connect the meter in parallel with the voltage point being measured, making the choice to connect in this manner clearly the most effective for obtaining a proper voltage reading.