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  • Electricity and Magnetism - II
  • How many 100 watt bulbs may be safely used on 220 volt wi...
Multiple choice

How many 100 watt bulbs may be safely used on 220 volt with five amperes fuse?

  1. 22

  2. 11

  3. 10

  4. 5

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

We know, P=VI For ‘n’identical bulbs, Total power = n  x 100 watts n *100 = 220 volts x 5 amperes n = 220 x 5 / 100  =11

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