electricity

Question 1

what is the SI unit used to measure electrical charges?

Answer 1

6.25x10^18 electrons

Question 2

We use a measure of electrons because electricity is most often due to their movement because __________________________________

Answer 2

protons are fixed to their position inside the nucleus

Question 3

can be used to describe the attraction and repulsion between any charged particles, including atomic particles

Answer 3

Coulomb’s Law

Question 4

Coulomb’s Law follows the _______________

Answer 4

inverse square law

Question 5

in Coulomb’s Law, Q1 and Q2 are _______________

Answer 5

quantities (electrostatic charges)

Question 6

in Coulomb’s Law, r is the _____________

Answer 6

distance

Question 7

in Coulomb’s Law, k is the ____________-

Answer 7

electrostatic constant (9.0 x 10^9Nm^2/c^2)

Question 8

5 laws of electrostatics

Answer 8

1. Like charges repel, unlike charges attract
2. Coulomb’s Law (the force of attraction or repulsion is a function of the square of their distance)
3. Electric charges reside only on the outside surface of conductors
4. The concentration of charges on a curved surface is greatest where the curvature is greatest
5. Only negative charges (electrons) are free to move

Question 9

when objects gain either a net positive or net negative charge

Answer 9

electrification

Question 10

3 modes of electrification

Answer 10

friction, contact, induction

Question 11

electrification in which electrons are rubbed away from one object and deposited on another

Answer 11

friction

Question 12

shuffling your feet on carpet is an example of what?

Answer 12

electrification via friction

Question 13

electrification in which when a charged object touches an uncharged object which then acquires the same charge

Answer 13

contact

Question 14

a shock when your finger touches a doorknob is an example of what?

Answer 14

electrification via contact

Question 15

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

Answer 15

induction

Question 16

charging an electric toothbrush is an example of what?

Answer 16

electrification via induction

Question 17

for electrical current to move, there must be an __________________

Answer 17

electric potential

Question 18

electric potential is measured in ___________

Answer 18

voltage or J/C

Question 19

A volt is defined as the potential difference that will maintain _________________ in a circuit with the resistance of ______

Answer 19

a current of one ampere, one ohm

Question 20

SI unit for energy

Answer 20

joules

Question 21

V = _________

Answer 21

J/C

Question 22

J = ___________

Answer 22

(V)(C)

Question 23

-A volt is _________________
-A current is ___________________-

Answer 23

-the difference in electric potential between two charges that makes current flow
-the actual flow of electrons

Question 24

Electric current exists when two conditions are met
1. There must be ______________________
2. There must be ____________________-

Answer 24

1. an electric potential difference between two charges
2. a suitable medium through which to travel (conductor)

Question 25

metals or substances with free electrons that allow the flow of a current.

Answer 25

conductors

Question 26

Good conductors have electrons that (are/are not) tightly bound to their atoms.

Answer 26

are not

Question 27

These electrons are then replaced by electrons from other atoms in a chain reaction that moves towards the ______ end of the potential

Answer 27

positive