00:01
So, let us start with the concept which we are going to use here for this question.
00:07
Since we know that according to kirchhoff's voltage law, the summation of the voltage inside a closed loop is equal to zero, while according to kirchhoff's current law, the sum of the current at a node is equal to zero.
00:26
So according to kirchhoff's law, the algebraic sum of potential difference in only a closed loop is equal to zero, while the current at a node is equal to zero.
00:36
So let's have a look to the circuit first.
00:39
So this is what the circuit diagram in which you can clearly see that the current i1, i2 we are given, while the potential e1, e2 is given that is 18 volt and 45 volt.
00:51
So first of all, let's say in the loop abcde, abcde, we are going from a to b.
01:07
So resistance always in the direction opposite to the current.
01:12
So the voltage will be minus of i2 times of r2.
01:17
So from b to c, the change in potential is plus times of e1, while internal resistance r1 from c to d is minus of i2 times of r1.
01:34
Similarly, from e to f, the i3 is in direction with the r3.
01:41
So the potential difference that across the r3 will be i3 into r3.
01:49
And finally, from f to g, the charge in potential is plus of i3 times of r2.
02:00
And from g to h, the change in potential will be minus of a2...