Question

State true or false.
The magnetic field line passing through the centre of a circular current carrying conductor is a straight line.

• A. True
• B. False

Answer 1

The correct option is A

True

In a circular coil the field lines near the coil are circular because the field near edges is effected by only one small part of conductor which is close to the point but as we move towards the centre, the field is affected by all the parts of the conductor equally and the sum of the effects is such that the field becomes nearly straight line.