Two magnetic field lines can never intersect each other. Explain.
Important Questions on Magnetic Effects of Electric Current
A student performs an experiment to study the magnetic effects 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?
In the figure below, identify the poles marked and as north pole or south pole. Give reason for your answer.
(a) Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another.
(b) List any two properties of magnetic field lines.
What happens to the deflection of the compass needle placed at a point near current-carrying straight conductor
(a) If the current is increased,
(b) If the direction of current in the conductor is changed,
(c) If compass is moved away from the conductor?
