The resistance of a 40W car head lamp drawing c... - JAMB Physics 2018 Question
The resistance of a 40W car head lamp, drawing current from a 12V battery is ____.
A
0.3Ω
B
3.3Ω
C
3.6Ω
D
4.8Ω
correct option: c
Power delivered to head lamp = \(\frac{V_2}{R}\)
= 40W
R = \(\frac{V_2}{40}\)
= \(\frac{(12 × 2)}{40}\)
= 3.6Ω
Please share this, thanks:
Add your answer
No responses