What is a solenoid ? When does a solenoid behave as a magnet ? Draw the pattern of the magnetic field…
What is a solenoid ? When does a solenoid behave as a magnet ? Draw the pattern of the magnetic field produced inside it showing the directions of the magnetic field lines.
Solution
A solenoid is a coil of many turns of insulated copper wires wrapped closely in the shape of a cylinder
When electric current is passed through it
[diagram: solenoid with magnetic field lines, labeled B and F/X]
(Deduct ½ mark if direction of current or magnetic field is not marked.)