Section 1: Introduction to electricity

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in what 3 forms can matter exist

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fundamentals of electrical

16 Terms

1

in what 3 forms can matter exist

Solid (ice cube) Liquid (water) Gas (steam)

<p>Solid (ice cube) Liquid (water) Gas (steam)</p>
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2

An atom which has an excess of electrons

negative ion

<p>negative ion</p>
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3

what factor does not affect the resistance of a conductor

voltage rating

<p>voltage rating</p>
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4

Approximate resistance of a 'short circuit'

zero ohms Ω

<p>zero ohms Ω</p>
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5

Approximate resistance of an 'open circuit'

maximum / infinity ohms Ω

<p>maximum / infinity ohms Ω</p>
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6

2 effects which must always occur when electric current passes

heat and magnetism

<p>heat and magnetism</p>
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7

direction of conventional current flow

positive + to negative -

<p>positive + to negative -</p>
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8

current

the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit

symbol I

measured in amphere

<p>the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit</p><p>symbol I</p><p>measured in amphere</p>
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9

voltage

pressure from an electrical circuit's power source that pushes charged electrons through a conducting loop, enabling them to do work

symbol V

measured in volts

<p>pressure from an electrical circuit&apos;s power source that pushes charged electrons through a conducting loop, enabling them to do work</p><p>symbol V</p><p>measured in volts</p>
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10

resistance

a force that counteracts the flow of current

symbol Ω

measured in ohms

<p>a force that counteracts the flow of current</p><p>symbol Ω</p><p>measured in ohms</p>
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11

cross-sectional area

larger the area results in having the least resistance

<p>larger the area results in having the least resistance</p>
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12

types of conductors

copper aluminium brass nichrome carbon mild steel silver tap water sea water

<p>copper aluminium brass nichrome carbon mild steel silver tap water sea water</p>
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13

types of insulators

pvc glass porcelain rubber air bakelite transformer oil mica

<p>pvc glass porcelain rubber air bakelite transformer oil mica</p>
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14

what electrical source does a battery provide

pressure

<p>pressure</p>
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15

what is potential difference

difference in voltage pressure between two bodies

<p>difference in voltage pressure between two bodies</p>
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16

electrons flowing creates...

electrical potential

<p>electrical potential</p>
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