In a DC circuit with V=28V and R=7Ω, what is the current?

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Prepare for the West-MEC RMA-AMT Module 2 exam with quizzes and flashcards. Each question in this engaging test has detailed explanations and hints to help you succeed. Master module content and take the next step in your medical certification journey!

Multiple Choice

In a DC circuit with V=28V and R=7Ω, what is the current?

Explanation:
The current is found using Ohm’s law: I = V / R. With V = 28 V and R = 7 Ω, I = 28 / 7 = 4 A. So the circuit carries 4 amperes. The other values would require different voltages: 2 A would need 14 V, 7 A would need 49 V, and 28 A would need 196 V. Since the voltage and resistance are fixed at 28 V and 7 Ω, only 4 A fits.

The current is found using Ohm’s law: I = V / R. With V = 28 V and R = 7 Ω, I = 28 / 7 = 4 A. So the circuit carries 4 amperes.

The other values would require different voltages: 2 A would need 14 V, 7 A would need 49 V, and 28 A would need 196 V. Since the voltage and resistance are fixed at 28 V and 7 Ω, only 4 A fits.

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