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In the circuit shown in fig the heat produced in the 5 ohm resistor due to the current flowing through it is 10 calories per second. The heat generated in the 4 ohms resistor is |
Answer» Correct Answer - `80 cal` Let `l, l_(1) ` be the current through upper and lower area of the circuit .resistance of upper arm of circuit `= 2 + 3 = 5 Omega` resistance of lower arm `= 6 + 4 = 10 Omega` Heat prodeced in `4 Omega` resistance `= l_(1)^(2) xx 4 =40 xx 4.2 J` `or l_(1)^(2) = 10 xx 4.2 or l_(1) sqrt(42)A` pot diff across lower arm `= l_(1) xx 10 = sqrt(42) xx 10 V` pot diff across arm `= 10 sqrt(42) V` Cyrrent through upper arm `l = 10 sqrt(42)//5 = 2 sqrt(42)A` Here produced per second in `2 Omega` resistance `= ((2 sqrt(42))^(2) xx 2 xx 1)/(4.2) = 80 cal` |
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