00:01
First question we're looking at the heater wire within an electric stove.
00:07
Now the question for the first part, we are just finding what is the current that is being drawn at the start, as well as the power, which it dissipates.
00:19
So to find its current, we can use i equals to v over r.
00:25
We are given that the voltage is 120 volts, and the resistance at root temperature is just 20 oms, right? so it's just when it turns on, right? so the resistance is still the same as at room temperature.
00:40
So the current from here should get 6 ampias.
00:45
The power dissipated, we can use p equals to iv.
00:50
So 6 times 120 should get 720 watts.
00:59
Now we are given that the stove is allowed to heat, heat up.
01:07
Until it reaches a temperature of 280 degrees.
01:15
And we want to find what is the current now as well as the power...