Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Electricity and Magnetism > ALL > Flashcards

ALL Flashcards

1
Q

example of history of electricity

A

ben franklin shows lightning is electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Force created by a difference in charges due to gained or lost electrons

A

electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what can move from one Atom to another; what cannot

A

electrons; protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what charge are electrons

A

negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what must you have for electricity to flow

A

Circuit, current, voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

electrons moving from point a to point B

A

current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is current measured in

A

amperes (amps)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

A closed continuous path

A

A circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

where does electricity always flow

A

A location with a positive charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

difference in charge from one end of the wires to the other that pushes the electrons

A

voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

electrons can be rubbed off of one object on to another

A

static charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what happens when a neutral objects are rub together and charges are rearranged

A

they stick together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A temporary one time charge produced by an excess of electrons

A

static electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

can be used to tell detect a static charge

A

electroscope

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what three ways is a static electricity caused

A

friction, conduction, induction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

when objects rub together and electrons are transferred

A

friction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

charged objects touch another object in electrons are transferred

A

conduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

A charged object is held close to another object and that causes charges to be rearranged

A

induction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

example of friction

A

during a storm, water and dust particles are rub together by winds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

example of conduction

A

during a storm charged areas touch other areas of the clouds and some charges are transferred

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

example of induction

A

during a storm when a highly charged cloud is overland, a charged area on the ground is produced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

how is lightning created

A

friction, and conduction, induction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

uses of static electricity

A

Air pollution control, air fresheners,xelography, painting cars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

provide a conducting path to the earth which is independent of the normal current carrying path in an electrical appliance

A

ground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Materials through which electrons can easily move

A

conductors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what are examples of good conductors of electricity

A

Metal, acids, sea water, tapwater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Materials through which electrons cannot move easily

A

insulator

28
Q

examples of good insulators

A

Wood, ceramic, Rubber, glass, plastic

29
Q

Materials that can slow the flow of electricity without stopping it off together

A

resistors

30
Q

what is resistance measured in

A

Ohms

31
Q

The push behind electric current to the number of electrons flowing and to the resistance to the flow

A

ohm’s law

32
Q

equation of ohms law

A

I = V/R

33
Q

what is voltage measured in

A

volts

34
Q

turns chemical energy into electrical energy and cause the voltage that makes electrons flow

A

electrochemical cells

35
Q

three main parts of electrochemical cells

A

Anode Cathode Electrolvte

36
Q

two kinds of electrochemical cells

A

wet cells and dry cells

37
Q

what is a wet cell and what is an example

A

liquid electrolyte; Car battery

38
Q

what is a dry cell; what is an example

A

A gel electrolyte; flashlight battery

39
Q

when electrons flow in only One Direction

A

Direct current

40
Q

electrons first go in One Direction, then reverse, then back again

A

alternating current

41
Q

A circuit in which the current must pass through all of the resistors on only one path

A

Series circuit

42
Q

A circuit in which the current can travel through more than one path

A

parallel circuit

43
Q

formula for electric power

A

P = V • I

44
Q

what is the formula for energy

A

E= P•T

45
Q

Device that moves a magnet near a wire to create a steady flow of electrons

A

generator

46
Q

regions of the magnet that produce magnetic force

A

magnetic poles

47
Q

how can space around a magnet through which magnetic force is exerted can be seen

A

with iron filings

48
Q

where are the magnetic field the strongest

A

at the poles

49
Q

why are most materials not magnetic

A

electron pairs cancel out Their magnetic field

50
Q

what elements have magnetic properties

A

Iron, nickel, cobalt

51
Q

when iron is placed in a strong magnetic field and when the magnetic field leaves The iron is still magnetic

A

permanent Iron magnet

52
Q

when placing materials with iron in them near a strong magnetic field, once fields are gone domains will revert to original state

A

temporary magnets

53
Q

how can you destroy a permanent magnet

A

by heating them up or dropping them

54
Q

what does reversing current flow of the magnetic field do

A

it reverses the direction

55
Q

current carrying coil of wire with many loops

A

electromagnets

56
Q

what three factors are electromagnets strength affected by

A

of loops in the coil
amount of current
presence of iron core

57
Q

what happens to charge particles when they are moving

A

they are deflected by magnetic fields

58
Q

is earth a magnet

A

yes

59
Q

is earths magnet stable

A

no

60
Q

what is the most used appliance at home

A

Air conditioners/heaters

61
Q

four major sectors that consume energy

A

industrial sector, transportation sector, residential sector, commercial sector

62
Q

what is an industrial sector

A

includes faculties and equipment used for manufacturing, agriculture, mining, and construction

63
Q

what is a transportation sector

A

includes vehicles that transport people or goods

64
Q

what is a residential sector

A

consists of homes and apartments

65
Q

what is a commercial sector

A

includes offices, malls, stores, hospitals, hotels, where houses, restaurants,other places

Electricity and Magnetism (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions