2 Electricity – Part B “Mains”


2.1 use the following units: ampere (A), coulomb (C), joule (J), ohm (Ω), second (s), volt (V), watt (W).

2.2 understand how the use of insulation, double insulation, earthing, fuses and circuit breakers in a range of domestic appliances.

2.3 understand why a current in a resistor results in the electrical transfer of energy and an increase in temperature, and how this can be used in a variety of domestic contexts

2.4 know and use the relationship:  

power = current × voltage  

P = I × V   or P=VI

and apply the relationship to the selection of appropriate fuses

2.5 use the relationship between energy transferred, current, voltage and time:

energy transferred = current × voltage × time

E = I × V × t   OR     E  =VIt

2.6 know the difference between mains electricity being alternating current (a.c.) and direct current (d.c.) being supplied by a cell or battery.


Use this PowerPoint & Quiz for a quick review…

Video Clips…



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