Question
a 6.0 kW electric oven is connected to a fuse box by a cable of resistance 0.25 ohms. when the cooker is switched on at full power, a current of 26 A passes through it.
Calculate the potential difference between the two ends of the cable and the power wasted in it because of the heating effect of the current.
What %age of the power supplied to the cable is wasted?
Calculate the potential difference between the two ends of the cable and the power wasted in it because of the heating effect of the current.
What %age of the power supplied to the cable is wasted?
Answers
bobpursley
power wasted: I^2 * resistance
Assuming the actual power used by the oven is 6kw, then voltage=6000/26 volts
percent power wasted= powerwasted/(6kw+powerwasted) * 100
Assuming the actual power used by the oven is 6kw, then voltage=6000/26 volts
percent power wasted= powerwasted/(6kw+powerwasted) * 100