Industrial Electrician Practice Test 2026

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If the potential across the circuit is 480 volts and the current is 50 amps, what is the resistance of the circuit?

10 ohms

9.6 ohms

To determine the resistance of the circuit, you can apply Ohm's Law, which states that voltage (V) equals the current (I) multiplied by the resistance (R). This relationship can be expressed in the formula:

\[ R = \frac{V}{I} \]

In this case, you have a potential of 480 volts and a current of 50 amps. Using the formula, you would calculate the resistance as follows:

\[ R = \frac{480 \text{ volts}}{50 \text{ amps}} = 9.6 \text{ ohms} \]

Thus, the calculated resistance of the circuit is 9.6 ohms, making this the correct answer. This result aligns with the principles of electricity, where knowing the voltage and current allows you to efficiently determine resistance in a circuit. Understanding this relationship is crucial for industrial electricians when diagnosing circuit behavior and making informed decisions regarding circuit design and maintenance.

12 ohms

8.4 ohms