Question

Draw magnetic field lines showing the direction of the magnetic field due to a current carrying long straight solenoid. State the conclusion which can be drawn from the pattern of magnetic field lines inside the solenoid.

Answer 1

• Inside the solenoid: The field lines are parallel and evenly spaced, indicating a uniform magnetic field similar to that of a bar magnet.
• Outside the solenoid: The field lines form closed loops, showing that the solenoid behaves like a magnet with a north and south pole.
• Stronger field inside: The field is stronger inside the solenoid and weak outside.