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Q.

In the circuit shown in fig. the rate of heat produced in the 5 ohm resistor is 20 Js-1

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a

The current in the 6 ohm resistor is 1 A.

b

The current in the 5 ohm  resistor is 2 A.

c

The rate of heat produced in the 4 ohm  resistor is 4 Js-1.

d

All of these  are correct

answer is D.

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Detailed Solution

for 5 ohm resistor i25= 20              i=2 A  current in the upper branch will be 1 A  as resistance is double 10 ohm in 4 ohm resitance power consumption 12 4 = 4 Js-1
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In the circuit shown in fig. the rate of heat produced in the 5 ohm resistor is 20 Js-1