1.

(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?

Answer» (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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