00:01
Hello student, to find thevenin equivalent circuit, so this is circuit with thevenin equivalent resistance rth and thevenin equivalent voltage vth.
00:13
This is the point a and point b.
00:23
Now to find rth, you have to remove all the current source and short circuit the voltage source.
00:29
So the circuit is, so this is 14 ohm, this is 6 ohm, this is 5 ohm, this is a and b.
00:53
Now rth is the equivalent resistance of this circuit which is 20 into 5 divided by 20 plus 5 equals to 4 ohm.
01:15
Now to find vth, you have to find the net current through this 5 ohm resistance.
01:25
Now to find the contribution from, we can use superposition theorem to find the current through 5 ohm resistance.
01:33
So first let's find the contribution from 1 ampere current source.
01:59
This is 14 ohm, this is 5 ohm.
02:04
Let's assume this current is i1.
02:06
So i1, this is 1 ampere, 1 into 6 divided by 25 ampere which is equals to 0 .24 ampere.
02:22
Now to find the contribution from 3 ampere current source, we can redraw the circuit as, let's assume the current is i1 dash.
02:47
Now i1 dash, so this is 6 ohm, this is 14 ohm...