electricity review

Question 1

negatively charged particles and have one unit (-1) of negative charge

Answer 1

electrons

Question 2

positively charged particles and have one unit (+1) of positive charge

Answer 2

proton

Question 3

neutrally charged particles and have neither a positive or negative charge (0)

Answer 3

neutron

Question 4

the electrons in an atoms create a negative charge that balances the positive charge of the protons in the atomic nucleus

Answer 4

stable atoms

Question 5

atoms with a net positive (+) charge. These atoms have fewer electrons than protons

Answer 5

positive ions

Question 6

atoms with a net negative (-) charge. These atoms have more electrons than protons

Answer 6

negative ions

Question 7

the study of the phenomena and properties of stationary or slow moving electric charges

Answer 7

electrostatics

Question 8

flowing electrical charges (electricity)

Answer 8

electrodynamics

Question 9

Electrical charges are measured in SI units called ___________

Answer 9

Coulombs

Question 10

One Coulomb = the electrical charge of __________ electrons

Answer 10

6.25 X 10^18

Question 11

neutrons and protons are bound together at the nucleus by what is called ____________

Answer 11

the strong nuclear force

Question 12

5 General Laws of Electrostatics
1. Like charges repel, unlike charges attract
2. Coulomb’s Law
3. Electric charges reside only _____________
4. The concentration of charges on a curved surface is (least/greatest) where the curvature is greatest
5. Only ____________ charges (________) are free to move

Answer 12

3. on the outside surface of conductors
4. greatest
5. negative (electrons)

Question 13

Coulomb’s Law describes ____________________

Answer 13

the attraction and repulsion between any charged particles, including atomic particles

Question 14

Three modes in which objects can be electrified

Answer 14

friction, contact, induction

Question 15

how does friction cause electrification?

Answer 15

electrons are rubbed away from one object and deposited on another (shuffling your feet on carpet)

Question 16

how does contact cause electrification?

Answer 16

when a charged object touches an uncharged object which then acquires the same charge (a shock when your finger touches a doorknob)

Question 17

how does induction cause electrification?

Answer 17

when an uncharged metallic object experiences a shift in electrons when brought into the electric field of a charged object

Question 18

when objects gain either a net positive or net negative charge

Answer 18

electrification

Question 19

_____________ is the potential energy between two charges either in attraction or repulsion

Answer 19

electric potential

Question 20

what is electric potential measured in?

Answer 20

Voltage or J/C (joules per Coulomb)

Question 21

a substance such as a conductive metal, with free electrons that allow the flow of a current

Answer 21

conductive substance