4.1 Magnetism

What is the role of iron filings in demonstrating magnetic fields?

• They create a magnetic field.

• They make the magnetic field lines visible.

• They repel magnetic fields.

• They neutralize magnetic fields.

What is the significance of the spacing of magnetic field lines?

• It shows the color of the magnetic field.

• It represents the relative strength of the magnetic field.

• It indicates the temperature of the magnet.

• It determines the size of the magnet.

What is a common use of a magnet due to its north-seeking pole?

• As a battery.

• As a compass.

• As a light source.

• As a heat conductor.

What is the law of magnetic poles?

• Like poles attract, unlike poles repel.

• Like poles repel, unlike poles attract.

• All poles attract each other.

• All poles repel each other.

What is induced magnetism?

• When a magnet loses its magnetism.

• When a non-magnetic material becomes a magnet.

• When a magnet is broken into pieces.

• When two magnets are combined.

What type of magnetism is induced in iron?

• Permanent

• Temporary

• Strong

• Weak

What type of magnets are made from steel?

• Temporary magnets

• Permanent magnets

• Soft magnets

• Weak magnets

What is a plotting compass used for in the context of magnetic fields?

• Measuring the strength of a magnet

• Plotting lines of force around a magnet

• Determining the temperature of a magnet

• Calculating the weight of a magnet

What happens at the neutral point X in Figure 4.1.8?

• The field is strongest

• The field is weakest

• The field cancels out

• The field is doubled

What is the purpose of sprinkling iron filings onto a sheet of paper over a bar magnet?

• To create a decorative pattern

• To show the lines of force

• To measure the strength of the magnet

• To test the magnet's temperature