and receive access to their purchased Resources for:
the rest of the 2011-2012 academic year
the summer holidays
the rest of the 2011-2012 academic year
Description
At the end of this activity, students should be able to: – state the advantages and disadvantages of batteries and mains as power supplies – describe the structure of a household electric mains – explain why circuit breakers are used – state the purpose of the third wire in a cable of certain devices – describe how a residual current circuit breaker is used – explain how three-phase current is separated for use in different apartments.
