Exploring Electricity and Magnetism Concepts

What is magnetism?

• A property of all materials that allows them to give off an attractive or repulsive force

• A property of some materials that allows them to give off an attractive or repulsive force

• A property of all materials that allows them to give off an attractive force only

• A property of some materials that allows them to give off a repulsive force only

How does the attractive force between magnets change with distance?

• It increases as the distance increases

• It decreases as the distance increases

• It first increases then decreases with distance

• It remains constant regardless of distance

What happens when a magnet is cut in half?

• The magnet becomes stronger

• The magnet loses its magnetic properties

• You get two smaller magnets each with a North and South pole

• You get a separate North and South magnet

Why can't magnetic poles be isolated?

• Because they are always aligned with Earth's magnetic field

• Because they reorient themselves to form new North and South poles

• Because they are too weak to be separated

• Because they are dependent on the material's temperature

What is unique about Earth's magnetic field?

• It does not affect any magnetic materials

• It is weaker than any man-made magnet

• Its geographic North Pole is actually the South Pole of the bar magnet inside Earth

• It has no effect on compasses

How do magnetic domains behave in a non-magnetic material?

• They are randomly oriented

• They are aligned in the same direction

• They are aligned opposite to each other

• They do not exist in non-magnetic materials

What is ferromagnetism?

• A phenomenon where objects lose their magnetic properties in a strong magnetic field

• A phenomenon where objects repel each other in a magnetic field

• A phenomenon where objects become non-magnetic in a strong magnetic field

• A phenomenon where objects placed in a strong enough magnetic field will become magnetized

How can the strength of an electromagnet be increased?

• By using a non-metallic core

• By decreasing the number of loops in the coil

• By using a weaker current

• By adding more loops to the coil and using a stronger current

What is the function of a motor?

• To store mechanical energy

• To store electrical energy

• To convert mechanical energy into electrical energy

• To convert electrical energy into mechanical energy

What does a generator do?

• Stores mechanical energy

• Converts electrical energy into mechanical energy

• Converts mechanical energy into electrical energy

• Stores electrical energy