Magnetism/Electricity Review

1) What would happen if you brought the south pole of a magnet next to the north pole of another magnet?

• They would attract.
• They would repel.
• They would neither attract or repel.

2) Which statement is correct about magnetic fields?

• The field lines criss cross each other near the poles.
• The field lines get closer the farther away you go from the magnet.
• The field loses strength farther from the magnet and the field lines go from the north to south pole.
• The field loses strength farther from the magnet and goes from south to south pole.

3) What is a device that changes kinetic energy into electrical energy?

• electric motor
• generator
• transformer
• galvanometer

4) Which of the following would have the strongest magnetic field?

• An electromagnet with a high current and 15 coils.
• An electromagnet with a low current and 15 coils.
• An electromagnet with a high current and 25 coils.
• An electromagnet with a low current and 25 coils.

5) Which statement best describes electromagnetic induction?

• Wrapping wires with electricity in them around a nail creates a magnetic field.
• Moving magnets near a coil of wire creates electrical current in the wire.
• A magnet's atoms and domains line up to create a magnetic field.

6) Where is the magnetic field the strongest on a magnet?

• furthest from the magnet
• between the magnets
• at the poles

7) Which of these metals cannot become magnetized?

• cobalt
• copper
• iron
• nickel

8) Which statement best describes what happens inside of a magnet when it becomes magnetized.

• The atoms and domains line up.
• The atoms and domains become randomized.
• The atoms and domains attract and repel.

9) Which instrument makes use of the Earth's magnetic field?

• magnetron
• electromagnet
• compass
• maglev

10) How could you use a string to determine the north pole of a magnet?

• Tie two magnets to a string and see which one points north.
• Hang a magnet from a string. The north pole will point north.
• Hang a magnet from a string. The north pole will point south.
• Tie two magnets to a string and see which one points south.