00:01
In this problem, we want to find the resistances of a 100 watt and a 60 watt bulb.
00:08
We know that the power of an electrical component is the product of the voltage and current, v multiplied by i.
00:19
In this case, in a, we know that the power of the bulb is 100 watts.
00:28
And we know that the voltage across the bulb is the standard socket voltage, which is 120 volts.
00:37
Now, as you can see that while we don't have the current i we need here, we can use omslough to find it.
00:45
We know that omslough says voltage is current multiplied by resistance, which means current is voltage divided by resistance.
01:00
Now if we use this in the formula for power, we can write power as voltage multiplied by voltage divided by resistance...