Some things can be charged by friction / E.G. Rubbing polythene rod with cloth - Electrons move from cloth to rod
3 of 21
Rule of Charges -
Opposite charges attract / Like charges repel
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Sparks - How do charged particles renew no charge
Two opposite charges cause a spark in air / Electrons pulled from air molecules to renew balance
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How Does Electricity work -
Negatively charged electrons carry the flow of charge through the metal as the positive metal ions remain stationary
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Charge Flow (Q) = ...
... Current (I) * Time (t)
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Ammeter -
Used in series / Measures current
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Voltmeter -
Used in parallel / Measures Voltage
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Potential Difference across component (V) =
Energy transferred (E) / Charge (C)
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Resistance is created in a wire as....
... Atoms in the wire are opposing the flow of charge
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Potential Difference (V) =
Current (I) * Resistance (R)
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Current is directly proportional to...
Potential difference
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Ohms law -
Resistance is always constant provided that the temperature stays constant
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Resistance increases as ...
Current increases which also causes an increase in temperature
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What is a Diode -
Allows current to flow in only one direction / A non ohmic conductor
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What is an ohmic conductor -
A conductor which follows ohms law
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What is a thermistor -
A temperature dependant resistor / Its resistance decreases as the temperature increases
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What is a LDR (Light Dependant Resistor) -
A light dependant resistor / Its resistance decreases as the light intensity increases
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Series Circuit -
Current Flows in one direction with no split / current is the same over each component / Total potential difference is shared between components / R(total) = R(1) + R(2) + ..... R(n)
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Parallel Circuit -
Current is split over multiple branches / Total current = combined current of each branch / Potential difference across each component is equal / Total resistance of components < resistance of weakest resistor
21 of 21
Other cards in this set
Card 2
Front
Any charged particle - positive or negative
Back
Ion -
Card 3
Front
Some things can be charged by friction / E.G. Rubbing polythene rod with cloth - Electrons move from cloth to rod
Back
Card 4
Front
Opposite charges attract / Like charges repel
Back
Card 5
Front
Two opposite charges cause a spark in air / Electrons pulled from air molecules to renew balance
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