1.

(i) Write an expression for the electrical energy spent in the flow of current through an electrical appliance in terms of I, R and t. (ii) At what voltage is the alternating current supplied to our houses ? (iii) How should the electric lamps in a building be connected ?

Answer»

(i) We know that E = VIt = I2Rt. 

(ii) 220V – 240V 

(iii) In a building, Electric lamps are connected in parallel



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