(a) What is meant by the heating effect of current? State thee factors on which the heat produced in a wire by an electric current depends.
(b) Explain why, though the heating element of an electric heater glows but its connecting cord does not glow.
(c) An electric geyser of resistance 20 Ω takes a current of 5 A. Calculate the heat produced in 2 minutes.
(d) Name the commercial unit of electric energy. How many joules are equal to this unit?
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Answer:When an electric current is passed through a high resistance wire like nichrome wire,then the wire becomes very hot and produces heat.This is called the Heating effect of electric current.
Factors on which heat produced depends on are :
-Amount of current flowing through the wire.
-Resistance of that wire.
-Time for which current is flown.
Explanation:
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