National League for Nursing (NLN) Science Practice Exam

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What is the voltage required to deliver a current of 1.0 amps to a device with a resistance of 1.5 ohms?

2.5 volts
1.5 volts
0.67 volts
0.5 volts

The correct answer is: 1.5 volts

To determine the voltage required to deliver a current of 1.0 ampere to a device with a resistance of 1.5 ohms, the formula from Ohm's Law is applied. Ohm's Law is expressed as V = I × R, where V stands for voltage, I for current, and R for resistance. Inserting the given values into this equation: - I (current) = 1.0 amps - R (resistance) = 1.5 ohms Calculating the voltage: V = 1.0 amps × 1.5 ohms = 1.5 volts. Thus, the correct voltage required to deliver the specified current to the device with the given resistance is indeed 1.5 volts. This aligns with the fundamental principles of electrical circuits, demonstrating that increasing resistance while keeping the current constant will result in a proportional increase in the required voltage.