Physics Exam Review

Question 1

Electrostatics

Answer 1

the study of electrical charges that move very little

Question 2

Neutral

Answer 2

term referring to matter not having a negative or positive electric charge

Question 3

Insulator

Answer 3

• a material that does not allow electric charges or heat to move freely on or through it
• hold e- tight
• almost no room

Question 4

Conductor

Answer 4

• a material that allows electric charges or heat to move freely on or through it
• Conductor (Metal) - loose valance e-
• lots of shell room

Question 5

Metal

Answer 5

• a chemical element such as aluminum, gold or iron

- very ductile and a good ability to conduct heat and electricity

Question 6

Non-Metal

Answer 6

• a chemical element such as oxygen or sulfur

- non-metals do not posses the properties of metals

Question 7

Law of attraction and repulsion

Answer 7

a law stating that like electric charges repel and unlike electric charges attract

Question 8

Electroscope

Answer 8

a device detecting the presence of electric charge

Question 9

Charging by contact

Answer 9

• start with charged object

- transfer to another object

Question 10

Charging by induction

Answer 10

• not actually charged

- create a charged area in balance

Question 11

Charging by friction

Answer 11

• e- are ripped off

- to work well - use an insulator

Question 12

Electrophorus

Answer 12

an instrument for generating static electricity by means of induction

Question 13

Lighting rod

Answer 13

a metal rod or wire attached to a building to prevent lightning damage by conducting the elections to the ground

Question 14

Cell

Answer 14

a usually microscopic structure containing nuclear and cytoplasmic material enclosed by a semipermeable membrane and, in plants, a cell wall; the basic structural unit of all organisms.

Question 15

Circuit

Answer 15

a path over which an electric current flows

Question 16

Potential difference/Volt

Answer 16

• the difference in electric potential energy per coulomb of charge at one point in a circuit compared to the potential energy per coulomb of charge at another point in the circuit
• the unit of potential difference

Question 17

Parallel Circuit

Answer 17

Parallel - multiple paths
Current (I) - splits up, still adds to total current (I)
Voltage (V) - same everywhere
Best for multiple applications - large electron
- house

Question 18

Series Circuit

Answer 18

Series - single path for I
I - same everywhere
V - add up to power supply
- simple circuits: toys or one function tool/applications

Question 19

Electromotive force

Answer 19

a source of energy that can cause a current to flow in an electrical circuit or device

Question 20

Photoelectric

Answer 20

pertaining to the electronic or other electric effects produced by light.

Question 21

Thermoelectric

Answer 21

term applied to the use of heat to generate electricity

Question 22

Piezoelectric

Answer 22

electricity, or electric polarity, produced by the piezoelectric effect.

Question 23

Chemo electric

Answer 23

tba

Question 24

Grounding

Answer 24

to connect a conductor through some conducting material directly to the ground, or Earth

Question 25

Resistance/Ohm

Answer 25

- potential difference across the load | - a unit of electrical resistance

Question 26

Ohm's Law

Answer 26

a law stating that the ratio of the potential difference between the ends of a conductor and the current flowing in the conductor is constant

Question 27

Battery

Answer 27

a combination of electric cells that produce a potential difference

Question 28

Load

Answer 28

in an electric circuit a device that resist the flow of current and converts electrical energy to another form of energy - example: light bulb

Question 29

Current/Ampere

Answer 29

- a flow of electric charge | - basic unit for measuring the strength of an electric current

Question 30

Charge/Coulomb

Answer 30

- a term referring to matter having a negative or positive charge - the unit of electric charge

Question 31

Energy/Joule

Answer 31

- the unit of energy

Question 32

Electromagnetic

Answer 32

the arrangement by wavelength of the different forms of electromagnetic radiation