Q. 28

Figure shows a part of a circuit. If a current of 12 mA exists in the 5 kΩ resistor, find the currents in the other three resistors. What is the potential difference between the points A and B?



Answer :

4mA, 8mA, 1340V.

Here, current in resistor is .


Let current through be and that from be such that


now, the potential across and has to be same as they are connected in parallel.






Current flowing through is 4mA and that from is 8mA.


To calculate potential difference, we need to find the equivalent resistance.



The current is


Therefore, potential between A and B is


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