1.  Label the following electrical symbols:        2.  Define electric current, what unit is it measured in and how is it measured?        3.  Which diagram below shows the correct way to measure the current in a lamp?                                                                            Diagram 1                         Diagram 2         4.  A battery of capacity 12 Amp-hours supplies a current of 3 A to an electric car.             For how long will the battery supply the current to the electric car?        5.  What are the two types of chemical cells?