A Resistor Develops Heat at the Rate of 20 W

question 57

Multiple Choice

A resistor develops heat at the rate of 20 W when the potential difference across its ends is 30 V. The resistance of the resistor is approximately

• A) 45 Ω.
• B) 5.5 Ω.
• C) 30 Ω.
• D) 1.5 Ω.
• E) 2 Ω.

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