an electric lamp operated for 2 days ( 17 min perday) have power rating 0.19kw. find out cost of operation if one unit = 9rs. define electric fuse why the heating element of heater alows not connecting wire
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Electrical fuse is a protective device in a series used in an electric circuit or an electrical appliances to protect it's damage due to overheating caused by strong current .
The heating element of heater allow current through a conducting wire because :
- It is made of an alloy.
- It has high resistance.
- It does not oxidised easily .
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