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1

static charge

Imbalance of electric charge on an object. In solids it is due to the transfer of electrons between objects.

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2

Proton charge

1.6 x 10^-19 C

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3

electrostatic force

the force that exists between particles due to their charge. particles of like charge repel, particles of unlike charge attract

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4

permanent magnet

A magnetic material that always has its own magnetic field around it

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5

magnetic flux

the number of magnetic field lines that pass through a surface

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6

Solenoid

A coil of wire that produces a magnetic field when carrying an electric current

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7

inverse-square law

a law that states that an energy field's strength is inversely proportional to the square of the distance from the energy field's source

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8

impulse

a force acting at a particular magnitude and time to change an object's momentum

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9

g force

the acceleration of a descending object due to gravity

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10

electromotive force (EMF)

the voltage created or supplied due to energy being transformed into electrical potential energy

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11

electromagnetic induction

the production of an electromotive force (EMF) due to the change in magnetic flux through a conducting loop

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12

faraday’s law

ε = -N x ΔΦB / Δt, calculates EMF

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13

induced current

the current produced in a conductor due to a changing magnetic flux

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14

Lenz’s Law

finds direction of current and induced emf in a loop

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15

generator

a device that transforms kinetic energy into electricity (either AC or DC) by electromagnetic induction

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16

alternator

a device that transforms kinetic energy into AC electricity by electromagnetic induction; an AC generator

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17

alternating current (AC) electricity

electricity with a periodically alternating direction of current and voltage

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18

slip rings

a component used to maintain a constant electrical connection between a stationary external circuit and a rotating coil

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19

amplitude

the distance from the x-axis to the top or bottom of the wave

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20

frequency

the number of cycles completed per second

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21

period

the time taken to complete one cycle

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22

direct current (DC) electricity

electricity with a constant direction of current and voltage

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23

split ring commutator

a component used to reverse the electrical connection between a stationary external circuit and a rotating coil every half rotation

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24

photovoltaic (PV) cell

a device that converts light energy into electrical energy

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25

semiconductor

a material that can be modified to control how it conducts electricity

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26

solar panel

an array of photovoltaic cells connected to produce a desired voltage and current

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27

inverter

a device that converts direct current (DC) into alternating current (AC)

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28

voltage

a measure of the difference in electric potential energy between two points, also known as potential difference

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29

current

the rate of flow of electric charge, measured in amperes

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30

resistance

a measure of the opposition to the flow of electric current

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31

resistor

an electrical component that resists the flow of electric current and causes a drop in voltage

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32

series circuit

an electric circuit where there is only one pathway for current to flow

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33

parallel circuit

an electric circuit where there are multiple pathways for current to flow

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34

ohm’s law

V = IR

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35

root-mean-square (RMS)

the DC voltage or current that would deliver the same average power as an AC source

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36

transformer

a device that uses electromagnetic induction to transfer power from one electrical circuit to another

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37

why is the voltage stepped up before being transmitted along the power lines?

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