An electric bulb is connected to a 200 V generator. The current is 0.5 A. The power of the bulb is

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ALP CBT 2 Physics and Maths Previous Paper 4 (Held On: 22 Jan 2019 Shift 1)
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  1. 10 W
  2. 1000 W
  3. 1 W
  4. 100 W

Answer (Detailed Solution Below)

Option 4 : 100 W
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Detailed Solution

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CONCEPT:

  • Electric Power: The rate at which electrical energy is dissipated into other forms of energy is called electrical power i.e.,

Where V = Potential difference, R = Resistance and I = current.

CALCULATION:

Given - Potential difference (V) = 200 V and current (I) = 0.5 A

  • Electric power can be written as,

​⇒ P = VI

⇒ P = 200 × 0.5 = 100 W

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