Magnetic Induction and Artificial Magnets Quiz

What is the primary effect when a natural magnet is brought near magnetic substances?

• It repels the substances.

• It induces magnetic properties in them.

• It demagnetizes them.

• It heats them up.

In the single touch method, what happens to the steel bar when stroked with a bar magnet?

• It becomes electrically charged.

• It loses its magnetic properties.

• It changes color.

• It gets magnetized.

How are the magnets positioned in the double touch method?

• With both magnets at one end of the bar.

• With one magnet on top of the other.

• With opposite poles close to one another.

• With like poles facing each other.

What indicates that a steel bar has been successfully magnetized?

• It emits light.

• It changes color.

• It becomes heavier.

• It attracts iron nails.

What is the role of the copper wire in the electrical method of magnetization?

• To conduct electricity and create a magnetic field.

• To insulate the magnet.

• To change the color of the magnet.

• To cool down the magnet.

What happens to an electromagnet when the current is switched off?

• It becomes stronger.

• It loses its magnetism.

• It retains its magnetism.

• It changes shape.

In the induction method, what happens to the end of the bar near the South Pole of the magnet?

• It becomes a South Pole.

• It becomes a North Pole.

• It loses its magnetism.

• It becomes electrically charged.

What is the region called where a magnet has its influence over an iron body?

• Magnetic area

• Magnetic field

• Magnetic circle

• Magnetic zone

What is the process of destroying the magnetism of a permanent magnet called?

• Magnetization

• Demagnetization

• Polarization

• Induction

What happens to a magnet when it is heated to redness and allowed to cool in the east-west direction?

• It becomes stronger.

• It loses its magnetism.

• It changes color.

• It becomes an electromagnet.