A. 0.3Ω
B. 3.3Ω
C. 3.6Ω
D. 4.8Ω
Correct Answer:
Option C – 3.6Ω
Explanation
Power delivered to headlamp = V²/R
= 40W
R = V²/40
= (12²)/40
= 3.6Ω
The resistance of a 40W car headlamp; drawing current from a 12V battery is?
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