00:01
Here it is given that the resistance r1 is equals to 3 kiloohm, r2 equals to 7 kiloahm, similarly r3 equals to 10 kiloohm, and r4 equals to 9 kiloahm, r5 equals to 4 kilo oom.
00:27
And we have to find the equivalent resistance between the point a and b, that is rab, equals to question mark.
00:35
So first of all, let us talk about the key concept which we are going to see here.
00:41
That is when resistance are connected in series, in that case r equivalent will be equals to r1 plus r2 plus up through that dash.
00:51
This is for series connection of resistor.
00:55
And similarly, if two resistors are connected in parallel, in that case, the equivalent resistance will be equals to r1 into r2 divided by r1 plus r2.
01:09
And this is for parallel connection of resistor.
01:16
Now let us look to the circuit first.
01:19
So after redrawing it, the circuit will look like this in which 9 kilo arm comes parallel to 4 kiloahm.
01:26
So in that case, by using the above concept, for parallel combination r -dash will be quashed to 9 multiplied by 4 divided by 4 plus 9, that will be quest to 36 divided by 13 would be quothed to 2 .77 kilo -ohm.
01:46
Now, if you see that, so again if we redraw the circuit, so this 7 -kilohm registers will call...