00:01
Hello students, in this question we have to find out the equivalent resistance along the terminal ab.
00:08
So, this is the two figures figure 1 and figure 2.
00:11
First we have to find for figure 1.
00:14
So, if you look at figure 1 we can see that r2 is parallel to r3.
00:19
So, their equivalent resistance r23 will be equal to so this will be equal to 60 into 20 divided by 60 plus 20 that is equal to 15 ohm.
00:36
So, after that r23 and r23 will be parallel to r4.
00:43
So, their equivalent resistance r234 will be equal to 15 into 20 sorry 30 15 into 30 divided by 15 plus 30.
00:57
So, that will be equal to 10 ohm and at last this r234 and r1 will be series will be series.
01:16
So, the final equivalent resistance r equivalence will be 10 plus 10 that will be equal to 20 ohm.
01:26
So, 20 ohm is the equivalent resistance across ab for the first figure and for the second figure.
01:32
So, if you look at the second figure we can see r9 is parallel to r11 sorry r9 and r11 are series.
01:49
So, r9 so r9 and r11 are series are series.
02:02
So, their equivalent resistance r9 11 will be 11 plus 9 equal to 20 ohm.
02:08
So, after that r9 11 is parallel to will become parallel to r10.
02:20
So, their equivalent resistance r9 10 will be equal to 4 by 2 sorry it is 20 into 5 divided by 20 plus 5.
02:39
So, that will be equal to 4 ohm.
02:43
So next, so next step this r9 10 will become parallel to r8...