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Question

An electric kettle consumes 1 KW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?
  1. 1 A
  2. 2 A
  3. 4 A
  4. 5 A


Solution

The correct option is D 5 A
Power, P= 1 KW = 1000 W
Voltage, V = 220V
P = V I
1000=220×I
I=1000220=4.54 A5A
Therefore, fuse wire of rating 5 A can be used.

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