Question

Differentiate between a solenoid and a circular coil.

Hint:

Solenoid acts like a bar magnet due to uniform internal field; a circular coil does not.

Answer 1

Solenoid:
Long coil with many turns of wire closely packed in a cylindrical shape.
Magnetic field inside is uniform and similar to a bar magnet.
Circular Coil:
Single or few turns of wire in a circular loop.
Magnetic field is concentrated at the center, not uniform throughout.