Q38 of 126 Page 198

Find the current through the 10Ω resistor shown in figure.


0A

Here, there are two loops,


KVL on loop 1 gives


—————(1)


KVL on loop 2 gives



—————(2)


Solving (1) and (2) gives,



and


thus current through is


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36

Find the potential difference Va – Vb in the circuits shown in figure.


 37

In the circuit shown in figure ϵ1 = 3V, ϵ2 = 2V, ϵ3 = 1V and r1 = r2 = r3 = 1Ω. Find the potential difference between the points A and B and the current through each branch.


 39

Find the current in the three resistors shown in figure.


 40

What should be the value of R in figure for which the current in it is zero.