A magnet produces a magnetic field. Which diagram shows the magnetic field pattern around a bar magnet? Select the correct diagram by checking the box to the right of the diagram. Pay special attention to which way the arrows are pointing in each diagram.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
What is the relationship between magnets and electricity?
Question 6
6.
Question 7
7.
What is created when a current is run through a coil of wire wrapped around an iron core? (type one word only)
Question 8
8.
Explain the difference between a motor and a generator?
Question 9
9.
What is an example of a machine that contains both a motor and a generator?
Question 10
10.
Question 11
11.
Question 12
12.
What are two ways to increase the strength of the magnetic field of an electromagnet?
Question 13
13.
Question 14
14.
EXTRA CREDIT: Which scientist discovered that an electric current produces a magnetic field?
Similar poles of a magnet repel each other.
True
False
All metals are magnetic.
True
False
If a magnet with two poles is cut in half, it will have only one pole
True
False
Which of the following creates a magnetic field?
Two wires next to each other
A piece of aluminum
A coil of wire carrying current
A plastic insulator
A magnetic force cannot act on an electron when it moves...
at an angle between 45 degrees and 90 degrees to the magnetic field lines.
at an angle between 90 degrees and 180 degrees to the magnetic field lines.
parallel to the magnetic field lines.
perpendicular to the magnetic field lines.
The north-seeking arrow of a compass points to the magnetic north pole.
True
False
What are some examples of energy sources that spin turbines, which power generators in electric power plants? (select all that apply)