Magnetism and electromagnetism

What is the unit for power?

• Amps (A)
• Volts (V)
• Watts (W)

What is the unit for current?

• Amps (A)
• Volts (V)
• Watts (W)

What is the unit for voltage?

• Amps (A)
• Volts (V)
• Watts (W)

Two like poles

• Attract
• Repel

Two unlike poles

• Attract
• Repel

A magnetically soft material

• Retains its magnetism for a long time
• Loses its magnetism quickly

Iron is

• Magnetically soft
• Magnetically hard

What direction do magnetic field lines flow?

• From North to South
• From South to North

Which of the following are magnetic materials? You can select more than one option.

• Iron
• Copper
• Nickle
• Cobalt
• Aluminium

How can we investigate the magnetic field pattern for a permanent bar magnet? You may select more than one option.

• Place the magnet under a piece of paper and sprinkle iron filings over the top of the paper.
• Use Fleming's left hand rule
• Use the right hand rule
• Place a compass near one of the poles of the magnet. Move the compass into various different places around the magnet & note the direction the compass is pointing. Join up the arrows to show the shape of the field.