00:01
My dear student here r d r.
00:03
D, r e, and rf, they are connected in series.
00:07
So their total resistance is let's denote that with r prime that is basically equal to their sum.
00:16
That is rd is 7 ohms, re is 8 ohms and rf is 15 ohms.
00:24
So this equals maria student 30 ohms.
00:29
Likewise r b r c and r prime they are connected in parallel so their parallel combination is let's denote that with r double prime so that would be equal to so this is 1 by r prime 1 divided by 5 oom that is r b r c is 1 divided by 10 oom plus r prime is 1 divided by 30 oom there has already been calculated here mario student so this basically equals 10 divided by 30 and if you take the reciprocal that would be equal to 30 divided by 10 there is 3 ohms right so the equivalent resistance is basically equal to mario student now here r double prime and r a they are in series so that would be r a plus r double prime is the equivalent resistance r a that is 6 .61 ooms plus r double prime is 3 ooms so from here the total resistance of the circuit equals 9 .61 ooms right so the current would simply be equal to current is equal to total voltage there is 9 volts divided by total resistance is that is 9 .61 ooms so the total current equals 0 .9 365 emperors.
02:16
So this is the total current myrious turn.
02:19
Now the potential difference across the 3 oom resistor, let's call it v -prime, that would be equal to the current.
02:26
There is 0 .9365 that has already been calculated times its resistance there is 3 oom...