Electricity

1. Electricity Vocabulary & Concepts Review

2. 1) A circuit is: • A) a complete path electricity can move through. • B) a light bulb. • C) a pushing force.

3. 2) Current electricity is: • A) one of two ends of a magnet. • B) an incomplete path. • C) electricity flowing through a circuit.

4. 3) A closed circuit is : • A) a region of magnetic force around a magnet. • B) a complete circuit allowing electricity to flow. • C) the strongest end of a magnet.

5. 4) An open circuit: • A) allows the flow of electricity. • B) is an incomplete path of electricity. • C) is a device that can turn on or off an electrical current.

6. 5) A conductor: • A) is a pushing or pulling force. • B) a region of magnetic force around a magnet. • C) allows the flow of electricity.

7. 6) An insulator: • A) prevents the flow of electricity. • B) is a complete path electricity can move through. • C) is a pushing force.

8. 7) Attract: • A) is a pulling force. • B) is a pushing force. • C) is an incomplete path.

9. 8) Repel: • A) is a pulling force. • B) is a pushing force. • C) is a complete path.

10. 9) A switch is a: • A) temporary magnet created when current electricity flows through wire wrapped in coils around an iron bar. • B) material through which electricity has difficulty flowing. • C) device that can open or close a circuit.

11. 10) A resistor is: • A) a device needed to push or pull an object. • B) a material through which electricity has difficulty flowing. • C) material that allows electricity to flow freely.

12. 11) Force is: • A) the pushing or pulling of an object. • B) not allowing electricity to flow. • C) a moving electrical current.

13. 12) A pole: • A) is found in the middle of a magnet. • B) is the weakest point of a magnet. • C) is found at the ends of a magnet.

14. 13) A magnetic field: • A)is only found in electromagnets. • B) is a material through which electricity has difficulty flowing. • C) is a region of force around a magnet.

15. 14) An electromagnet: • A) is found at the end of a magnet. • B) is a temporary magnet created when current flows through wire wrapped in coils around an iron bar. • C) is an incomplete circuit.

16. 15) In a magnet, iron particles are: • A) lined up neatly in the same direction. • B) not lined up and in a scattered pattern. • C) not found.

17. 16) In non-magnetic iron items, the iron particles are: • A) lined up neatly in the same direction. • B) not lined up and in a scattered pattern. • C) not found.

18. 17) Give an example of an item we use which doesn’t include a switch: • A) flashlight • B) pencil sharpener • C) radio

19. 18) Give an example of an electrical insulator: • A) plastic handle on a pan • B) wooden spoon • C) rubber handles on jumper cables for a car.

20. 19) Electricity flows from ______ to _______. • A) warmer , colder • B) positive, negative • C) negative, positive

21. 20) Magnets attract when…. • A) they are both north poles. • B) they are opposite poles. • C) they are both south poles.

22. Check your answers on the following page:

23. Answers to Problems 1-8 • 1) A 6) A 11) A 16) B • 2) C 7) A 12) C 17) B • 3) B 8) B 13) C 18) C • 4) B 9) C 14) B 19) C • 5) C 10) B 15) A 20) B