Question

compute the heat energy produced in an electric circuit if a 5ohm resister draws a current of 2amphere in 0.5 seconds ​

Answer 1

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Heat produced , H=I2Rt

here, tH5=I52R5=10⇒I5=510=2 . This is the current through resistor 5Ω.

Voltage across  resistor 5Ω is V5=I5R5=2×5=52V

As resistors (4,6) and 5 are in parallel, so potential across (4,6) is equal to V5.

As resistor 4 and 6 are in series so current through each resistor I4=I6=4+6V5=4+652=22

Heat produce in resistor 4 per sec =I42R4=(22)2×(4)=2cal/sec   

Answer 2

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Heat produced , H=I2Rt

here, tH5=I52R5=10⇒I5=510=2 . This is the current through resistor 5Ω.

Voltage across resistor 5Ω is V5=I5R5=2×5=52V

As resistors (4,6) and 5 are in parallel, so potential across (4,6) is equal to V5.

As resistor 4 and 6 are in series so current through each resistor I4=I6=4+6V5=4+652=22

Heat produce in resistor 4 per sec =I42R4=(22)2×(4)=2cal/sec