Physics · Magnetism and Electromagnetic Induction

Magnetic field inside the solenoid is stronger as compared to outside the solenoid.

This option is correct. A solenoid is a coil of wire that generates a magnetic field when current passes through it. Inside the solenoid, the magnetic field lines run parallel to the axis of the coil, forming a nearly uniform field in the central region. This is why solenoids are often used to create strong and controlled magnetic fields in applications like electromagnets and inductors.

This option is incorrect. While individual current-carrying wires produce circular magnetic fields, the overall magnetic field inside a solenoid is along its axis. Outside the solenoid, the magnetic field lines loop back to the other end, forming a closed loop similar to a bar magnet.

This option is incorrect. The magnetic field inside a solenoid is strongest in the middle and weakens at the ends. Near the ends, the field lines start to spread out, reducing the field strength.

This option is incorrect. The magnetic field in a solenoid is nonzero as long as current is flowing. If no current flows, then there is no magnetic field, but as soon as a current is applied, the solenoid generates a strong magnetic field.