The resistance of a 40W car head lamp, drawing current fr...
The resistance of a 40W car head lamp, drawing current from a 12V battery is ____.
0.3Ω
3.3Ω
3.6Ω
4.8Ω
Correct answer is C
Power delivered to head lamp = V2R
= 40W
R = V240
= (12×2)40
= 3.6Ω
The electricity meters in houses measure energy unit consumed in ...
The image in a pine-hole camera is always ...
The pressure of a gas when cooled at constant volume will decrease because the molecules ...
Which of the following are transverse waves? I. Ripples on water II. Sound waves in air III. Li...