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Our electricity bills consist of many different forms of energy use. In order to be able to make estimates
on how much different appliances use electricity and how much savings could be done by investing less
electricity consuming ones, you need to have understanding on electricity calculations.
Solve the calculations below:
An electric heater of power 2500 W is connected to a voltage of 230 V.
i) Calculate the electric current going through the heater.
ii) What is the resistance of the heater?
iii) How much energy does it consume in a year, if it is switched on 15 min every day.
iv) How much it costs per year to use the heater when the price of electricity is 0,0479 €/kWh?
1 answer