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Question 34: An electric heater is connected to the 230 V mains supply. A current of 8 A flows through the heater. (a) How much charge flows around the circuit each second ? (b) How much energy is transferred to the heater each second ? Lakhmir Singh Physics Class 10 |
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Answer» .p.d. = 230 V, I = 8 A(a) from the formula....I = Q/tQ = I × tQ= 8 × 1 = 8Ccharge FLOWS around the circuit each second is 8C(b) p.d. = 230 VI = 8 Awe KNOW.. ENERGY transferred = work doneso from the formula...p.d. = work done/CHARGE movedwork done = p.d. × charge movedwork done = 230 × 8 = 1840Jso the energy transferred is 1840J |
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