A current of 6 A flows through a circuit component with resistance 7 Ω. What is the voltage?

A) 1 V

B) 13 V

C) 49 V

D) 42 V

Answer: D

Explanation: Ohm’s law gives voltage = current × resistance = 6 × 7 = 42 V. The relation applies to a circuit component under the stated conditions.

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