Draw the magnetic field lines around a straight conductor carrying current. Name and state the rule to find the direction of magnetic field.

Draw magnetic field lines around a bar magnet.

Draw the magnetic field lines due to a straight wire carrying current.

The magnetic field in a straight current carrying conductor wire is:

Write the help of a labelled circuit diagram, describe an activity to illustrate the patterns of the magnetic field lines around a straight current carrying long conducting wire. (i) Name the rule that is used to find the direction of magnetic field associated with a current carrying conductor. (ii) Is there a similar magnetic field produced around a thin beam of moving: (a) alpha particles (b) neutrons? Justify your answer.