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Download Chapter 1 Test – Electricity
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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.