Easy
1 point
ID: #19356
Question
Two electric bulbs rated for the same voltage have power of 200W and 100W respectively. If the resistances are respectively R1 and R2, then -
Options
1
R1 = 2R2
Correct Answer
2
R2 = 2R1
Correct Answer
3
R2 = 4R1
Correct Answer
4
R1 = 4R2
Correct Answer
Explanation
Since power P = V²/R, resistance is inversely proportional to power at constant voltage. The 100W bulb has half the power of the 200W bulb, so its resistance (R2) will be double the resistance (R1).