00:01
Okay, in this problem we have a circuit with four different resistors.
00:08
Two of these are in parallel with each other.
00:14
And then we have two more in series with those.
00:20
We're told that the voltage of the circuit is 10 volts.
00:26
So we have r1 here, r2, r3, and r4.
00:35
R1 has 100 ohms.
00:38
R2 has a resistance of 30 ohms.
00:44
R3 is 56 ohms.
00:49
And r4 is 62.
00:51
So we want to know the current in this circuit.
00:56
So that's just the total current for the circuit, which would be i.
01:03
It will split off when it gets to the parallel circuits.
01:09
But we just want to know the actual current, the total current.
01:15
So to find that, we can use v equals ir, ohms law, and solve for the current, which is going to be v over r.
01:27
However, we need the total resistance of the circuit first.
01:31
So r total.
01:33
To do this, we can first combine the two parallel resistors into one resistance...