What happens when two north poles of two different magnets are brought close to each other?

They neither attract nor repel.

They rotate to align with each other.

What is one of the key differences between a permanent magnet and an electromagnet?

Permanent magnets are always magnetic, while electromagnets can be turned on and off.

Electromagnets are always magnetic, while permanent magnets can be turned on and off.

Permanent magnets can be demagnetized instantly, while electromagnets cannot.

Permanent magnets use electricity to induce magnetism, while electromagnets do not.

How can you create a uniform magnetic field using two bar magnets?

Place the north poles of both magnets close together.

Place the south poles of both magnets close together.

Align the opposite poles (north and south) a few centimeters apart.

Place both magnets in a parallel alignment with their poles facing in the same direction.

What is the main characteristic of the magnetic field lines near the poles of a magnet?

The field lines are widely spaced apart.

The field lines are straight and parallel.

The field lines are closest to each other.

The field lines are curved and random.

How can the magnetic field around a bar magnet be plotted using a compass?

Sprinkle iron filings on a sheet of paper above the magnet.

Use a compass to trace the direction of the magnetic field lines from one end of the magnet to the other.

Place a magnet under the paper and tap gently to align filings.

Draw random dots around the magnet and connect them.

Why is soft iron typically used in electromagnets?

It easily loses its magnetism once the inducing current is removed.

It is cheaper than other magnetic materials.

What is the purpose of arrows on magnetic field lines?

To show where the magnetic force is weakest.

To indicate the direction of the magnetic field from north to south.

To differentiate between north and south poles.

To indicate where to place iron filings.

Which property of magnetic field lines indicates the strength of the magnetic field?

Spacing between the field lines

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