Electricity and Magnetism

What will happen if the north pole and the south pole of a magnet are near each other?

• They will repel

• They will attract

• Nothing will happen

Choose all the materials that are magnetic. (more than 1 answer)

• Aluminium

• nickel

• cobalt

• iron

• copper

Where is the magnetic force the strongest around a magnet?

• middle of the magnet

• poles of the magnet

• the whole piece of magnet

• none of the above

What is a domain? (as in a domain in iron)

• a material that can be attracted to magnets

• how strong the magnetic force is

• a small group of atoms that act like tiny magnets

how can you magnetize a piece of unmagnetized iron? (more than 1 answer)

• heat the piece of iron

• stroke it with a magnet in one direction.

• leaving it beside a magnet for a while.

how can you remove magnetism from a magnet? (more than 1 answer)

• break the magnet in half

• hammer the magnet

• heat up the magnet

• you cannot remove magnetism from a magnet

Which one is incorrect?

• A magnetic field is an area around a magnet that has magnetic effects on different materials

• You cannot see a magnetic field, they are invisible.

• The magnetic force is stronger when the magnetic field lines are wider apart.

• The earth has a magnetic field.

What type of circuit works best for the lights in your house? Why?

• A series circuit, they are simple, only one loop of wire

• A parallel circuit, if one bulb breaks the others keep working

• Any type of circuit works very well

• None of the above

What is the voltage of a circuit?

• the flow of electrons around a circuit

• the amount of energy generated and passed around a circuit.

• The energy/electricity user

How can you measure the current of a circuit? What is it measured in?

• you measure it with a voltmeter in volts

• you measure it with an ammeter in volts

• you measure it with an ammeter in amps

• you measure it with a voltmeter in amps