1 Rubbing two objects such as plastic and wool together creates a static charge because:

2 Bits of paper stick to a plastic comb that has been rubbed because of:

3 When electrons are transferred from one object to another, positive and negative charges are:

4 An important difference between insulators and conductors is that in conductors:

5 When an electroscope is charge its leaves spread apart because:

6 Four 6 volt batteries are connected in parallel to a light. The potential across the light is:

7 The rate at which energy is transferred is

8 The resistance on a conductor can be determined if ____ are known.

9 The current flowing in a circuit can be increased by:

10 A device that measures the amount of current in a circuit is a(n):

11 Utility companies measure energy use in:

12 If there are four electrical devices connected in series, how many paths are there?

13 The energy from the sun is the result of:

14 An object that is magnetic has:

15 Increasing the number of loops in an electromagnet causes the strength of the magnetic field to:

16 An electric current is generated when:

17 An electric generator converts:

18 In a step-up transformer, the primary voltage is ____ the secondary voltage.

19 Electric charge that has built up in one place is referred to as:

20 A static discharge differs from an electric current in that a static discharge:

21 If the leaves on an electroscope spread apart, it indicates that they:

22 Lightning is:

23 One source of constant electric current is a:

24 The function of a motor is to change:

25 A material through which electrons do not readily flow is:

26 Which list ranks the materials from poorest conductor to best conductor?

27 A path created for a current that has only one route for the current is called a:

28 A circuit that has two or more separate paths for electrons to follow is a(n):

29 Which if the following is the correct relationship among power, current, and voltage?

30 Which of the following is the correct unit for electrical energy?

31 An ammeter measures:

32 A voltmeter measures:

33 The location of the strongest magnetic forces are the:

34 The region around a magnet where the magnetic forces act is the:

35 Objects that keep their magnetic properties for a long time are called:

36 The force between two unlike magnetic poles is called:

37 The force between two like magnetic poles is called:

38 Particles of matter that make up protons and neutrons are:

39 Atoms of the same element with different numbers of neutrons are called:

40 A particle that moves around the nucleus is called:

41 The type of radioactive particle that can be stopped by a sheet of paper is the:

42 The most penetrating type of radiation is the:

43 A helium nucleus with two protons and two neutrons is called:

44 Negatively charged particles emitted from a nucleus at a high speed are:

45 The process by which nuclei having small masses are united to form a nucleus with a heavier mass is:

46 The three types of nuclear radiation in order of increasing hazard to human health:

47 Although radioactive isotopes can be dangerous, they are commonly used:

48 Neutrons released in a fission reaction can strike other nuclei and cause:

49 Thorium-234 has a half life of 24 days. If you started with 100g sample, how much would remain after 48 days?

50 The amount of radioactive sample that decays during one half-life is: