00:01
19 .23.
00:03
So we have these three resistors connected in this manner here with the given resistances, and each one has a maximum power rating of half a watt.
00:12
And so we want to figure out what the maximum voltage is that we can apply to the entire configuration of resistors here before, you know, one of them will overheat.
00:30
So we have two expressions for power in resistors that we get from the general expression for power and from omslaw.
00:39
So the general expression for power is the voltage times the current and that gives us i squared r and v squared over r for resistors.
00:58
So the current is the square root of the power we can have divided by the resistance and the maximum voltage is the square root of the resistance times the power or the power times the resistance you know, whatever.
01:23
And so let's figure out the maximum currents and voltages we can have through and across respectively each of the resistors.
01:44
So the maximum through what i've called r1 here is 0 .041 amps for 2.
02:06
It is 0 .041 .2.
02:08
It is 0 .0 .4 .2.
02:10
It is 0.
02:16
0116 amps and for 3 it's 0 .0189 amps.
02:36
Then similarly the maximum voltages are 35 .4 volts, 43 .0 volts and 26 .5 volts...