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JEE Main20244 Apr 2024Evening ShiftPhysicsCurrent ElectricityActual

An electric bulb rated 50 ~W -200 ~V is connected across a 100 ~V supply. The power dissipation of the bulb is:

Options

  1. A25 ~W
  2. B12.5 ~W
  3. C50 ~W
  4. D100 ~W

Correct answer

B. 12.5 ~W

Step-by-step solution

Rated power & voltage gives resistance aligned & R = V ^2 P = (200)^2 50 = 40000 50 & R =800 & P = ( V _ applied )^2 R = (100)^2 800 & P =12.5 watt aligned

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