00:01
In this question, we have six light bulbs, three of which have 45 -on resistance and the other three have 75 -on resistance.
00:11
And we have connected them in series and we want to calculate the equivalent resistance of the whole circuit.
00:23
So the equivalent resistance of resistors in series would be the addition of all -circuit.
00:31
Resistances so we have three r1 resistances and three r2 resistances so in simple words three r1 plus three r2 and we need just to plug in r1 and r2 values the resistances values so three multiplied by 45 plus three multiplied by three 75 will give us 360 which is the equivalent resistance of the whole circuit and in second part of the question we have connected the same six resistors or light bulbs in parallel and we want to find the equivalent resistance of this circuit now to simplify the solution, we can first calculate the equivalent resistance of the 3 r1 resistors that are the resistances with 45 -on and next the other three resistances.
02:03
So let's just cut the circuit at this point and replace the 3 r1 resistors.
02:11
So i am drawing an equivalent resistant circuit for this problem.
02:23
So i cut the circuit here and replaced the three r1 resistors with an equivalent resistor, which we call it r equivalent one.
02:40
So our equivalent one is the equivalent resistance for three r equivalent...