Which of the following property/properties are correct for the magnetic field lines around a bar magnet: (i) Magnetic field lines form closed loops (ii) Magnetic field lines do not intersect (iii) Outside the magnet, magnetic field lines go from south to north pole of the magnet.

Correct option is C

Sol: The correct answer is (c) Both (i) and (ii)

Let's analyze each of the given properties of magnetic field lines around a bar magnet:

(i) Magnetic field lines form closed loops:

• Correct. Magnetic field lines always form closed loops. They emerge from the north pole and curve around to enter the south pole of the magnet. Inside the magnet, the field lines continue from the south pole to the north pole, forming a continuous closed loop.

(ii) Magnetic field lines do not intersect:

• Correct. Magnetic field lines never intersect each other. If they did, it would mean that the magnetic field has two different directions at the same point, which is impossible.

(iii) Outside the magnet, magnetic field lines go from the south to the north pole of the magnet:

• Incorrect. Outside the magnet, magnetic field lines go from the north pole to the south pole. Inside the magnet, they go from the south pole to the north pole, but outside, the direction is reversed.

The correct properties for the magnetic field lines around a bar magnet are:

• (i) Magnetic field lines form closed loops.
• (ii) Magnetic field lines do not intersect.

Information booster:

Magnet:

• A magnet is any material or object that produces a magnetic field, attracting or repelling materials such as iron, cobalt, and nickel.
  

Bar Magnet:

• A bar magnet is a specific type of permanent magnet, shaped like a bar or rectangle. It has a north pole at one end and a south pole at the other.