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  • 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.

    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.

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As given in the question, the maximum current which can pass through electric oven is 5 A. So let's find out how much current will pass through the device in given power ratings.

So for power, we have a relation

 Power (P) = Voltage(V) X Current (I) 

So putting given values, we get

2 kW = 220 v X Current (I)

\ Current(I)=\frac{2000}{220}A=\frac{100}{11}A=9.09A

As we can see the current flowing in the electric oven is 9.09 A which is greater than 5 A. this can be a dangerous situation. the insulation on the wire may melt and cause a short circuit problem. we use a fuse to protect us from this situation. a fuse is just a wire which melts and breaks the circuit in the case of overcurrent situation like above.

 

Posted by

Pankaj Sanodiya

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