1. A_____ is a circuit with only one loop for current to follow. Series circuit

2. An accumulation of excess electric charge is ____. Static electricity

3. What is voltage difference? The electric force that makes current flow in a circuit

4. According to ___, electric charge cannot be created or destroyed Law of conservation of charge

5. What type of substance makes the best conductor? Metals

6. Resistance in wires causes electrical energy to be converted into which form of energy? Thermal energy

7. What happens to the electric force if the distance between two electric charges is increased? Force becomes weaker

8. A commonly used unit for electrical energy is ___ Kilowatt hour kWh

9. Like charges ____; opposite charges _____ Repel; attract

10. The SI unit for current is the ____ ampere

11. An ___ surrounds every electric charge and exerts a force that causes other charges to be attracted or repelled. Electric field

12. ____is a transfer of charge between two objects because of buildup of static electricity Static discharge

13. Connecting an object to earth with a conductor is called _____ Grounding

14. A device that can detect the presence of an electric charge is called an ____ Electroscope

15. The net movement of electric charge in a single direction is an _____ electric current

16. _____is the tendency for a material to oppose the flow of electrons Resistance

17. The rearrangement of electrons on a neutral object caused by a nearby charged object is called ___ Charging by induction

18. Which is stronger between a proton and an electron— gravitational force or electric force? Electric force

19. The SI unit for voltage difference is ___ Volts v

20. A material in which electrons are able to move easily is a ____ conductor

21. A material in which electrons are not able to move easily is an ____ because the electrons are held tightly to the atoms. Insulator

22. An example of a large discharge of static electricity is ____ lightning

23. What prevents damage from lightning? Grounding

24. 6.25 x 10 18 electrons is equal to one ___ amp

25. When current flows what caused the net movement of electric charges? Electric force

26. Electric charge flows from ____ voltage to ___ voltage. Higher; lower

27. A closed path that electric current follows is a(n) ____ circuit

28. The units for measuring resistance are ____ ohms

29. What object have greater resistance: metals or nonmetals? nonmetals

30. Name three things that will cause the resistance in an object to increase. Longer wire Thinner wire Increase the temperature of the wire

31. If you decrease the resistance and increase the voltage difference in a circuit, what will happen to the current? The current will increase

32. The relationship between voltage difference, current, and resistance in a circuit is known as ____ Ohm’s law

33. _____ circuits contains two or more branches for current to move thru. Parallel

34. Household circuits: series or parallel? parallel What type of voltage? 120v and 240v

35. What is the purpose of a fuse box or circuit breakers? Prevent overheating

36. A ____has a small piece of metal in it that melts if the current becomes too high breaking the circuit. fuse

37. A_____ contains a piece of metal that bends when the current is too high causing the switch to flip to the off position. Circuit breaker

38. The rate at which electrical energy is converted to another form of energy is the ____ Electric power

39. In Ohms Law, the letter I represents ____ current

40. What is used to maintain voltage difference in a circuit? battery

41. What is the difference between a dry cell battery and a wet cell battery? Type of electrolyte