Magnetism and Electromagnetism

What is magnetism?

• A Force
• A Mass
• A Current
• A resistance

Like poles................

• Repel
• Attract
• Cross each other
• Bend round each other

What is the general term for materials that can be magnetised?

• Insulators
• Ferromagnetic
• Conductors
• Iron

Which of these materials cannot be magnetised?

• Cobalt
• Copper
• Iron
• Nickel

Which one of these cannot be used to magnetise a material?

• Strike with a hammer
• Place in a magnetic field
• Current flow through a material
• Add iron to the material

Using the curl right hand rule what do the fingers indicate?

• Direction of current
• Direction of force
• Direction of magnetic field
• Direction of movement

Which direction does a magnetic field travel?

• east to west
• south to north
• north to south
• up to down

What type of magnet is created by putting a current through a wire?

• semiconductor
• permenant
• semimagnetic
• electromagnet

What is the main benefit of an electromagnet with respect to a permanent magnet?

• The magnetic field is stronger
• it has multiple north poles
• the magnetic field can be turned on and off
• It is easier to magnetise

Which one of these is not true?

• Lines of flux always form complete loops
• Flux lines cannot intersect
• Lines of flux always flow from North to South
• Lines of flux can be cut/intterupted