Q137 / 150 · JEE Main 2006 · Physics

An electric bulb is rated 220 volt $-100$ watt. The power consumed by it when operated on 110 volt will be

  • A
    50 watt
  • B
    75 watt
  • C
    40 watt
  • Correct answer
    D
    25 watt

Solution

$\frac{V_1^2}{P_1}=\frac{V_2^2}{P_2}=$ Resistance $\Rightarrow P_2=25 \mathrm{~W}$

Hence, the correct answer is option: 'D'.

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