1.

An electric oven of 2 kW power rating is operated in a domestic electric circuit (220 V) that has a current rating of 5 A. What result do you expect? Explain.

Answer»

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Solution :POWER, `P=2kW=2xx1000W=2000W`
Voltge, `V=220V`
CURRENT drawn, `I=?`
Power, `P=V xx I`
`I=(P)/(V)=(2000)/(220)`
`=9A` (approx)
The current drawn by this electric oven is 9A whereas the fuse in the circuit is only 5 A capacity. When a high current of 9 A flows throughthe 5 A fuse, the fuse will get heated too much, MELT and break the circuit. Therefore, when a 2 kW power rating electric oven is operated in a circuithaving 5 A fuse, the fuse will blow off cutting off the power supply in this circuit.


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