Question

Hans Cristian Oersted noticed that a compass needle placed close to a current
carrying conductor gets deflected. This experiment has been the first one to indicate
that current carrying conductor produces a magnetic field.
A student performs an experiment to study the magnetic effect of current around a
current carrying straight conductor with the help of a magnetic compass. He reports
that
(i) The degree of deflection of the magnetic compass increases when the compass is
moved away from the conductor.
(ii) The degree of deflection of the magnetic compass increases when the current
through the conductor is increased.
Which of the above observations of the student appears to be wrong and why?
(ii) State the rule to determine the direction of the magnetic field produced around a
straight conductor-carrying current,

Answer 1

Answer:

If you hold a compass near a wire through which current is flowing, the needle on the compass will be deflected. ... The magnetic field produced by an electric current is always oriented perpendicular to the direction of the current flow.