PhysicsHow much current will an electric bulb draw from a 220 V source if the resistance of the bulb filament is 1200 Ω?

How much current will an electric bulb draw from a 220 V source if the resistance of the bulb filament is 1200 Ω?


  1. A
    0.18 A
  2. B
    0.19 A
  3. C
    0.03 A
  4. D
    0.08 A 

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    Solution:

    The current drawn by the electric bulb from a 220 V source, if the resistance of the bulb filament is 1200 Ω  will be 0.18 A.
    Given that voltage  = 220 V and
    resistance R = 1200 Ω Now we know that = IR   I = VR  …(1)             ( in terms of current)
    Where, I = current
     = voltage or potential difference
    = resistance
    By putting given values in the equation (1) we get,
             I = 2201200    I = 1160 
         = 0.18 A
      
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