Page 28 - 383_
P. 28

Gathering Information

                            Step 1

                                  Draw  a  diagram  to  illustrate  the  second  part  of  the
                            experiment.  Label  the  diagram  with  these  words:  wire  bridge;
                            battery;  terminals;  pivoted  needle;  direction  of  deflection;
                            connecting leads.

                            Step 2

                            Are  the  following  statements  true  or  false?  Correct  any  that  is
                            wrong.
                            a)  Oersted was trying to show that electricity and magnetism were
                               not related.
                            b) For this experiment he used a kind of compass needle, a wire
                               bridge and an electric generator.
                            c)  He first placed the magnetic needle underneath the wire, then
                               connected the wire to the battery.
                            d) The needle under the wire was pushed first one way, then the
                               other.
                            e)  In the second part of the experiment he put the needle above the
                               wire.
                            f)  The needle above the wire was not deflected at all.
                            g) Oersted thought the wire was surrounded by a magnetic field.


                            Step 3

                            Find words and expressions in the Input with similar meanings to
                            the  following:  free  to  turn,  pushed  away,  beneath,  connection,
                            carrying an electric current, apparatus, a form of, put.

                            Step 4

                            The  bottom  diagram  represents  the  magnet  in  the  top  diagram
                            broken into pieces. None of the pieces has been moved. Draw the


                                                           26
   23   24   25   26   27   28   29   30   31   32   33