Magnetism 1

What is the primary difference between magnetically hard and soft materials?

• Hard materials can be easily magnetised and demagnetised.

• Soft materials retain their magnetism for a long time.

• Hard materials retain their magnetism for a long time.

• Soft materials cannot be magnetised.

Which of the following best describes a magnetic field line?

• A line that shows the direction of the electric field.

• A line that shows the direction of the magnetic force.

• A line that shows the direction of the gravitational force.

• A line that shows the direction of the magnetic field.

What happens when a material is placed in a magnetic field?

• It becomes electrically charged.

• It becomes magnetised.

• It loses its magnetic properties.

• It becomes heavier.

Which of the following is a property of magnetically soft materials?

• They are difficult to magnetise.

• They retain their magnetism permanently.

• They are easily magnetised and demagnetised.

• They cannot be magnetised.

In a practical investigation, what pattern is observed around a permanent bar magnet?

• Circular field lines.

• Straight field lines.

• Random field lines.

• Field lines that curve from the north to the south pole.

How can two permanent magnets be used to produce a uniform magnetic field pattern?

• By placing them with like poles facing each other.

• By placing them with opposite poles facing each other.

• By placing them far apart.

• By placing them in a circular arrangement.

What is the effect of placing a non-magnetic material in a magnetic field?

• It becomes magnetised.

• It remains unaffected.

• It becomes electrically charged.

• It repels the magnetic field.

Which of the following substances is most likely to be attracted to a magnet?

• Copper

• Aluminium

• Iron

• Plastic

What is the term used to describe the process of a material becoming magnetised when placed in a magnetic field?

• Electrification

• Magnetisation

• Polarisation

• Ionisation

Which of the following is NOT a property of a magnetic field line?

• They never intersect.

• They form closed loops.

• They start from the south pole and end at the north pole.

• They are denser where the magnetic field is stronger.