Question

Three bulbs of 40W, 60W and 100W are arranged in series with 220V. Which bulb has minimum resistance

• A. 40W
• B. 60W
• C. 100W
• D. Equal in all bulbs

Answer 1

Answer: (C)

100W

Answer 2

$P = \frac{V^{2}}{R} \Rightarrow R \propto \frac{1}{P}$

So resistance of the 100W bulb will be minimum