An incandescent lightbulb is rated at 100 watts when plugged into a 110 V rms household outlet. Calculate the resistance of the filament and the rms current.
A. 12.2 ?, 0.91 A (rms)
B. 10 ?, 1.0 A (rms)
C. 110 ?, 1.0 A (rms)
D. 121 ?, 0.91 A (rms)
E. 11 ?, 1.1 A (rms)
Answer: D
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