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  • A torch bulb draws a current of 0.2 A from a source of 2 ...
Multiple choice

A torch bulb draws a current of 0.2 A from a source of 2 V and glows. Calculate resistance of the torch bulb.

  1. 0.1Ω

  2. 0.4Ω

  3. 0.04Ω

  4. 10Ω

  5. 1Ω

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When the bulb glows: V = I R ---- Ohm's law R = V/I = 2/.2 =10 Ω

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