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electricity unit > Electricity unit > Flashcards

Electricity unit Flashcards

1
Q

electrical energy

A

Energy is the ability to do work, where work is done when a force moves an object.

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2
Q

static electricity

A

Static electricity is an imbalance of electric charges within or on the surface of a material.

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3
Q

proton

A

a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

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4
Q

electron

A

a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

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5
Q

neutral charge

A

A normal atom has a neutral charge with equal numbers of positive and negative particles.

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6
Q

charge separation

A

charge separation is the process of an electron in an atom or molecule, being excited to a higher energy level by the absorption of a photon and then leaving the atom or molecule to a nearby electron acceptor.

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7
Q

electrical discharge

A

electric discharge is the release and transmission of electricity in an applied electric field through a medium such as a gas.

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8
Q

van de graaff

A

Van de Graaff generator is an electrostatic generator which uses a moving belt to accumulate electric charge on a hollow metal globe on the top of an insulated column, creating very high electric potentials.

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9
Q

electrical current

A

electric current is a flow of electric charge.

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10
Q

amperes

A

(or amp) is the base unit of electric current in the International System of Units.

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11
Q

voltage

A

an electromotive force or potential difference expressed in volts.

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12
Q

circuit

A

a roughly circular line, route, or movement that starts and finishes at the same place.

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13
Q

load

A

electrical load is an electrical component or portion of a circuit that consumes (active) electric power.

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14
Q

source

A

sources are defined as the resources for electric power.

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15
Q

conductor

A

a conductor is an object or type of material that allows the flow of an electrical current in one or more directions.

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16
Q

potential difference

A

the difference of electrical potential between two points.

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17
Q

volt

A

volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force.

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18
Q

voltmeter

A

an instrument for measuring electric potential in volts.

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19
Q

insulators

A

Insulators are used to protect us from the dangerous effects of electricity flowing through conductors. (wood, and rubber)

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20
Q

3 prong plug

A

three-prong plug is an electrical connector that ensures proper grounding of the electrical circuit with the connected device.

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21
Q

fuse

A

provide (a circuit or electrical appliance) with a fuse

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22
Q

circuit breaker

A

an automatic device for stopping the flow of current in an electric circuit as a safety measure.

23
Q

electrochemical cell

A

electrochemical cell is a device capable of either generating electrical energy from chemical reactions or facilitating chemical reactions through the introduction of electrical energy.

24
Q

dry cell

A

an electric cell in which the electrolyte is absorbed in a solid to form a paste, preventing spillage.

25
Q

electrolyte

A

a liquid or gel that contains ions and can be decomposed by electrolysis. (the stuff in a battery)

26
Q

ion

A

an atom or molecule with a net electric charge due to the loss or gain of one or more electrons

27
Q

electrode

A

a conductor through which electricity enters or leaves an object, substance, or region.

28
Q

wet cells

A

a primary electric cell in which the electrolyte is a liquid.

29
Q

primary cell

A

an electric cell that produces current by an irreversible chemical reaction.

30
Q

rechargeable cell

A

is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use.

31
Q

secondary cell

A

A rechargeable electric cell that converts chemical energy into electrical energy by a reversible chemical reaction.

32
Q

battery

A

a container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.

33
Q

electrolysis

A

chemical decomposition produced by passing an electric current through a liquid or solution containing ions.

34
Q

electrochemistry

A

the branch of chemistry that deals with the relations between electrical and chemical phenomena.

35
Q

electroplating

A

coat (a metal object) by electrolytic deposition with chromium, silver, or another metal.

36
Q

SECTION 2——>

A

technologies can be used to transfer and control electrical energy

37
Q

superconductors

A

a substance capable of becoming superconducting at sufficiently low temperatures.

38
Q

resistor

A

a device having a designed resistance to the passage of an electric current.

39
Q

resistance

A

the ability not to be affected by something, especially adversely.

40
Q

ohms

A

the SI unit of electrical resistance, expressing the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt

41
Q

variable resistor

A

An electronic component that is used to vary the amount of current that flows through a circuit.

42
Q

rheostat

A

an electrical instrument used to control a current by varying the resistance.

43
Q

ohm’s law

A

The potential difference (voltage) across an ideal conductor is proportional to the current through it. The constant of proportionality is called the “resistance”, R.

44
Q

voltage drop

A

is defined as the amount of voltage loss that occurs through all or part of a circuit due to impedance.

45
Q

millivoltmeter

A

is an instrument used for measuring electrical potential difference between two points in an electric circuit.

46
Q

ammeters

A

an instrument for measuring electric current in amperes.

47
Q

galvanometers

A

an instrument for detecting and measuring small electric currents.

48
Q

multimeters

A

an instrument designed to measure electric current, voltage, and usually resistance, typically over several ranges of value

49
Q

schematic diagram

A

a schematic diagram, in particular of an electric or electronic circuit.symbolic and simplified.

50
Q

series circuit

A

is a closed circuit in which the current follows one path, as opposed to a parallel circuit where the circuit is divided into two or more paths.

51
Q

parallel circuit

A

is a closed circuit in which the current divides into two or more paths before recombining to complete the circuit.

52
Q

transistor

A

a semiconductor device with three connections, capable of amplification in addition to rectification.

53
Q

microcircuits

integrated circuits

A

a minute electric circuit, especially an integrated circuit.

electricity unit (2 decks)

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