In a simple circuit with a 4 Ω resistor and 2 A current, what is the voltage?

Enhance your skills for the Ascension Composite Cadet Competition. Prepare with focused flashcards and engaging multiple choice questions, all with detailed hints and explanations. Ace your exam with confidence!

Multiple Choice

In a simple circuit with a 4 Ω resistor and 2 A current, what is the voltage?

Ohm's law relates voltage, current, and resistance: V = I × R. With 2 A flowing through a 4 Ω resistor, the voltage drop is V = 2 × 4 = 8 volts. So the voltage is 8 volts. If the voltage were 6 volts, the numbers would require a current of 1.5 A or a 3 Ω resistance, which isn’t the given setup. A voltage of 10 volts would need 2.5 A, and 12 volts would need 3 A.

Ohm's law relates voltage, current, and resistance: V = I × R. With 2 A flowing through a 4 Ω resistor, the voltage drop is V = 2 × 4 = 8 volts. So the voltage is 8 volts.

If the voltage were 6 volts, the numbers would require a current of 1.5 A or a 3 Ω resistance, which isn’t the given setup. A voltage of 10 volts would need 2.5 A, and 12 volts would need 3 A.

More practice questions