00:01
In this question, we are given with an electrical circuit and the circuit contains two batteries, here 4 volt and 12 volt and also the battery having internal resistance, 4 volt battery having 4 -on internal resistance and 12 -volt battery having 2 ome internal resistance.
00:24
And also two other resistors 3 o and 7 o are connected in the circuit.
00:32
And also a current i is passing through the circuit and the direction of the current is from a to b in anti -clockwise manner.
00:45
These are the details given in the question.
00:48
For the part a, we need to find current in the circuit, that is i that we need to find.
00:57
The concept used to solve this question is kritchov voltage loop rule.
01:03
According to kritchov voltage rule or kvl in any closer loop, the total voltage around the loop is equal to the sum of all the voltage drops within the same loop.
01:19
Sum of all voltage drops equal to zero.
01:24
Also from holmes law, we know that v equal to ir...