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A bulb rated at (100W-200V) is used on a 100V line. The current in the bulb is
  • a)
    1/4 amp
  • b)
    4 amp
  • c)
    1/2 amp
  • d)
    1 amp
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A bulb rated at (100W-200V) is used on a 100V line. The current in the...
We know that P = V2 / R
Thus as P = 100W and V = 200V we get R = 40000/100 = 400Ω
Now as we know V = IR
We get I = V / R
= 100 / 400
= ¼ A
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A bulb rated at (100W-200V) is used on a 100V line. The current in the...
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Community Answer
A bulb rated at (100W-200V) is used on a 100V line. The current in the...
We know that P = V2 / R
Thus as P = 100W and V = 200V we get R = 40000/100 = 400Ω
Now as we know V = IR
We get I = V / R
= 100 / 400
= ¼ A
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A bulb rated at (100W-200V) is used on a 100V line. The current in the bulb isa)1/4 ampb)4 ampc)1/2 ampd)1 ampCorrect answer is option 'A'. Can you explain this answer?
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