Question

Magnetic field inside a long solenoid carrying current is:
A. Same at all points (uniform)
B. Different at poles and at the centre
C. Zero
D. Different at all points.

Answer 1

To find the solution to this problem we need to consider magnetic field lines inside a long current carrying solenoid.

Complete step by step solution:
Inside the solenoid the magnetic field lines are parallel to each other forming a uniform field strength which indicates that the magnetic field is the same at all points inside the solenoid.

Therefore, the answer is Option A .

Additional information: Solenoid is a coil of wire which is in cylindrical form. When it carries a current it acts like a magnet and is used especially as a control for a mechanical device.

Note: When we run a current through a solenoid it becomes an electromagnet.