Question

Explain why the magnetic field generated by the coil should be symmetric and discuss possible causes if deviations are observed. The coil is a solenoid.

Answer 1

Answer:-

The solenoid may be considered as the result of placing large number of coils close to each other. So the resultant magnetic field due to the solenoid is the net magnetic field due to the individual coils. We know that magnetic field lines do not cross each other. So when the coils are brought together to form a solenoid their individual magnetic field also comes up closer and mix up to give a net symmetric magnetic field inside the solenoid.

Now the solenoid behaves like a bar magnet called electromagnet. When current flows it acts like a magnet and when current does not flow the field disappears.