Electricity and Magnetism

Front

Magnetism

Back

the force of attraction or repulsion of magnetic materials

Front

Magnetic field: Which of the following is the most appropriate definition?

an area surrounding a magnet that does not apply a force (a push or pull)

,

an area directly on the magnet that applies a force (a push or pull) without actually touching an object

,

an area of magnetism surrounding a magnet that applies a force (a push or pull) without actually touching an object

,

an area surrounding a magnet that applies a force (a push or pull), but only by directly touching an object

Back

an area of magnetism surrounding a magnet that applies a force (a push or pull) without actually touching an object

Front

If placed in a magnetic field, which of the following materials would be affected?

• a compass
• wood chips
• plastic paper clips
• pieces of glass

Back

a compass

Front

How does the electromagnet in the diagram above demonstrate the relationship between magnetism and electricity?

Back

The wire in the electric circuit is wrapped around an iron core producing a magnetic field.

Front

What is flowing through the electromagnet?

Back

electric current

Front

In order for the electromagnet above to lose its magnetism, what must occur?

Back

The electric current must stop flowing in the circuit.

Front

What energy transformation occurs in this device?

Back

mechanical energy to electrical energy

Front

How is the device above different from an electric motor?

Back

Electric motors turn electrical energy into mechanical energy.

Front

What is the best description of a generator?

Back

A generator produces an electric current when a coil of wire wrapped around an iron core is rotated near a magnet.

Front

How do turbines affect generators?

Back

They rotate the magnets.