A student is using a 98 ohm resistor to build a circuit with a voltage source. If the student needs 0.54 amperes of current to flow through the resistor, what voltage should be used?

53 V

Explanation:

Since the problem gives you a Resistance and a Current, you can use Ohm's Law (V = IR) to solve the problem.

Ohm's Law is Voltage = Current * Resistance

For this problem, the current is 0.54 A (amperes) and the resistance is 98 ohms. Plugging this into Ohm's Law gives:

V = (0.54 A) (98 ohms) = 53 V