Calculate the cost of electrical energy usage of the appliance the cost of one kilowatt - hour of energy 30 cents .
Answers
Answer:
Electrical power is the rate of electrical energy supply. It is the amount of energy supplied per unit of time. In simpler terms, it is how fast the electrical energy is supplied.
Power is measured in watts (W).We can calculate the power using the formula:
Power = energy/time
Energy is measured in joules and so this means that power is the amount of joules supplied in a certain period of time. When doing calculations of power, you need to have the energy measured in joules and time measured in seconds.
1 watt is the same as 1 joule of energy transferred in a second. (1 watt = 1 joule per second)
There are 1000 watts in 1 kilowatt (kW).
Different appliances use different amounts of power, depending on their function. All electrical appliances have a stamp or a sticker which indicates the power rating. If you look at your hairdryer or kettle you should find it easily.