1.   State an equation that links power, current and voltage. 

2.   Calculate the missing values in the table below.

3.   A food processor draws a current of 2 A. Calculate the power of the processor if it is connected to the mains supply at 230 V.

4.   A mains appliance draws a current of 6 A. Calculate its power.

5.   What current will be drawn by a low voltage 12 V, 50 W light bulb.

6.   A small hand held torch has a power of 3 W. Calculate the voltage of the supply if the current to the torch filament is 500 mA.

7.   A mains hair drier is rated at 1200 W

(a)        What will be the current to the hair drier when operating at its maximum power?

(b)   The drier contains a fan and heating elements. Which of these will consume the most power?