Physics
WAEC 2019
A device consumes 100 W of power when connected to a 120 V source. Calculate its resistance.
-
A.
1.2\(\Omega\)
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B.
12,000 \(\Omega\)
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C.
20.0\(\Omega\)
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D.
144\(\Omega\)
Correct Answer: Option D
Explanation
P = \(\frac{V^2}{R}\)
R = \(\frac{120^2}{100}\)
= 144.0\(\Omega\)
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