An electric lamp is labeled 12 V, 36 W. This indicates that it should be used with a 12 V supply. What other information does the label provide?

What is the meaning of the symbol kWh? Which quantity does it represent?

If the potential difference between the end of a wire of fixed resistance is doubled, by how much does the electric power increase?

What current will be taken by a 920 W appliance if the supply voltage is 230 V.

Define watt. Write down an equation linking watts, volts and amperes.