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Physics > Jake Amos Electricity > Flashcards

Jake Amos Electricity Flashcards

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1
Q

Active wire

A

A circuit wire connected to the 240v rms supply at the switch board

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2
Q

Alternating current

A

Refers to circuits where the charge carriers move backwards than fowards periodically

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3
Q

Ammeter

A

A device used to measure current

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4
Q

Ampere

A

The unit of current

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5
Q

Battery

A

Consists of 2 or more cells joined together and used as a single unit it has two terminals

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6
Q

Capacity

A

The capacity of a battery provides a measure of the time for which a battery can supply a fixed current

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7
Q

Circuit

A

An electrical circuit is a complete conducting psthway

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8
Q

Charge carrier

A

A charge particle moving in a conducting Pathway

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9
Q

Closed circuit

A

A circuit in which the conductors form a continuous path through which a current can circulate

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10
Q

Circuit breaker

A

Carriers out the same function as fuse by breaking the circuit when a current exceeds a certain value

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11
Q

Conventional current

A

The movement of positive charges from the positive terminal of a cell through the conductor to the negstive terminal

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12
Q

Direct current

A

DC refers to circuits where the net flow of charge is in one direction only

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13
Q

Earth wire

A

Wire used in power circuits as a safety device it connects the case of the appliance being used to the earth

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14
Q

Efficiency

A

A measure of the ability to convert an energy input into a useful energy output

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15
Q

Electric charge

A

A basic property of matter it occurs in two states positive charge and negative charge

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16
Q

Electric current

A

The movement of charged particles from one place to another

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17
Q

Electric insulator

A

In an electric insulator the electrons are bound tightly to the nucleus and are not free to travel through the the material

18
Q

Electric shock

A

A violent disturbance of the nervous system caused by an electric discharge or current flowing through the body

19
Q

Electric potential energy

A

Measures in joules the potential energy of a charge carriers due to their position in the circuit

20
Q

Electrocution

A

Death brought by electric shock

21
Q

Electron

A

A negatively charged particle found around the nucleus of an atom

22
Q

Electron current

A

The term used when dealing with the mechanisms for the movement of electrons

23
Q

Electron volt

A

EV a unit used to measure small amounts of energy

24
Q

Hydro electrity

A

Electrical energy generated from turbines that are turned by the kinetic energy of flowing water

25
Q

Internal resistance

A

Internal resistance of the source of emf is the resistance associated with it because it forms part of the du function path

26
Q

Neutral wire

A

In a circuit wire connected to the wire connected to the neutral link at a switch board which is connected to the earth

27
Q

Non-ohmic device

A

A device which the resistance is diferent for different currents passing through it

28
Q

Nuclear energy

A

The energy emitted by a nucleus as it becomes more stabld

29
Q

Ohmic device

A

A device for which under constant physical condition such as temperature the resistance is constant for all currents that pass through it

30
Q

Open circuit

A

In which their is a break in the path so that the current canot flow

31
Q

Coulomb

A

The unit of electric charge

32
Q

Conductor

A

In an electric circuit the conductor can be the wire connecting the circuit elements

33
Q

Load

A

A device where electric potential energy is converted into other forms of energy to perform a task such as heating or lighting

34
Q

Switch

A

Stops or allows the flow of electricity through a circuit

35
Q

Potential difference

A

See voltage drop

36
Q

Power

A

The rate of doing work or the rate at which energy is transferred or transformed it is measured in watts

37
Q

Neutron

A

A nucleon with no charge

38
Q

Proton

A

A positively charged particle in the nucleus of an ato,

39
Q

Resistor

A

Used to control the current flowing through and the voltage drop across parts of a circuit

40
Q

Series

A

Devices joined together one after another

Physics (1 decks)

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