When is the magnetic field the strongest?

when the field lines are far apart
when the field lines are close together
when the field lines are longer
when the field lines are shorter
when the field lines are straight

The magnetic field of a bar magnet is strongest at either pole of the magnet. It is equally strong at the north pole compared with the south pole. The force is weaker in the middle of the magnet and halfway between the pole and the center.
hope this helps

The correct answer is 'when the field lines are close together'.

Explanation:

Magnetic field lines are pictorial representation of magnetic field around the magnet. They following properties:

They never intersect with each other.The strength of magnetic field is higher when these lines are closer and lower when these lines are apart.These lines are continuous with no beginning and and ending, like closed loop.They move from north pole to south pole when outside the magnet and move from south pole to north pole when inside the magnet.

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