Download Chapter 1 Test – Electricity

Chapter 2 PRACTICE Test – Magnetism Name __________________________________ # ____
Part I. Vocabulary: Write the letter of the meaning on the line next to the word.
___1. generator
a. a coil through which an electric current passes
___ 2. magnetism
b. the space around a magnet in which magnetic forces operate
___ 3. magnetic poles
c. a force that acts on moving electric charges and some metals
___ 4.magnetic field
d. a machine that changes motion energy into electrical energy
___5. electromagnet
e. the two ends of a magnet
Part II. Multiple Choice: read each question and choose the best answer.
Circle the correct answer.
1) Know what is magnetic?
2) What will make an electromagnet stronger??
3) A bar magnet is hanging from a string. What happens if you hold a compass near the
magnet?
4) Maglev trains use the power of ?
5) How can you magnetize a needle?
6) A compass needle points toward which place on Earth?
7) What is the relationship between magnetic field and the distance from the magnet?
8) What causes the metal disc in an earphone to vibrate and make sound?
9) According to scientists, what might produce Earth's magnetic field?
10) What happens if a bar magnet is broken into two pieces?
11) At which location is the magnetic field the strongest?
12) At which location is Earth's magnetic field the strongest?
13) How many poles does a magnet have??
14) In which direction does the arrow of a compass needle point?
15) How does a compass work?
Part III. Complete each sentence with the correct word or phrase. Use the word(s) in the word
bank below. Use each word only once. Not all of the words will used.
Word Bank:
wire
motors
current
electric current
iron bar
compass needle
generator
motion
1. A moving magnetic field can produce electric _____________________________________.
2. The strength of an electromagnet can be increased by putting a(n) ________________________
inside the coil of wire.
3. A __________________________________ changes motion into electrical energy.
4. The magnetic field of an electromagnet can be made stronger by adding layers of ____________.
5. All electromagnets produce a magnetic field when an ___________________________________
passes through them.
6. A wire with electric current flowing through it will deflect (turn away) a ___________________.
7. Electromagnets are used in electric _____________________________________, which change
electrical energy into energy of motion (mechanical energy).
Part IV. Write T (True) or F (False) on the line before each statement.
1. _____ All rocks and minerals are natural magnets.
2. _____ Electromagnets are in many common electronic devices.
3. _____ A compass needle is a tiny rock
4. _____ Like poles of a magnet repel each other
5. _____ A rotor's magnetic field has two poles.
6. _____ All magnetic fields have the same shape
7. _____ Earth has north and south poles.
8. _____ A magnet's field gets stronger as you move away from the poles.
9. _____ A motor changes electrical energy into a spinning motion.
10. _____ In a doorbell, electricity flowing in a coil of wire magnetizes an electromagnet and
pulls up a contact arm.