If a 10-ohm resistor has 2 A of current, what is the voltage across it?

Get ready for the FCC General Radiotelephone Operator License (GROL) exam. Study with flashcards and multiple choice questions, each with hints and detailed explanations. Prepare effectively for your licensing test!

Multiple Choice

If a 10-ohm resistor has 2 A of current, what is the voltage across it?

Voltage across a resistor follows Ohm’s law: V = I × R. With a current of 2 A through a 10-ohm resistor, the voltage is 2 A × 10 Ω = 20 V. So the voltage drop across the resistor is 20 volts. If the resistance were different, the voltage would scale accordingly (for example, 2 A through 12 Ω gives 24 V, through 14 Ω gives 28 V, etc.), but for the given values, 20 V is the correct result.

Voltage across a resistor follows Ohm’s law: V = I × R. With a current of 2 A through a 10-ohm resistor, the voltage is 2 A × 10 Ω = 20 V. So the voltage drop across the resistor is 20 volts. If the resistance were different, the voltage would scale accordingly (for example, 2 A through 12 Ω gives 24 V, through 14 Ω gives 28 V, etc.), but for the given values, 20 V is the correct result.

More practice questions