Electric Circuits

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What happens when insulating matterials are rubbed together
Friction occurs creating heat
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What is transferred when objects become charged
Static electricity
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What happens when charges are brought together
They will attract towards each other or repel away
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What is the diffrence beetween a battery and a cell
A cell is a single unit while a battery is a collection of cells
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What determines the size of an electric current
Current and Time
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How to calculate the size of an electric current
Current x Time
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What is potential diffrence
What allows the current to flow
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What is resistance
Anything that slows the object down measured in ohms
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Ohms Law
a law stating that electric current is proportional to voltage and inversely proportional to resistance.
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How does the current through a diode depends on the PD
For a fixed potential difference the amount of current decreases with increasing resistance.
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How do you calulate Potential difrence
Currrent x Resistance
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How to calculate the resistance of two resistors in series
1) Measure the current using an ammeter Use this to calculate the resistance 2) Add another resister in series with the first 3) Again measure the current through the circuit use this and the P.D to find the overall resistance.
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Why does adding resistors increase resistance
As it decreases the current.
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Other cards in this set

Card 2

Front

Static electricity

Back

What is transferred when objects become charged

Card 3

Front

They will attract towards each other or repel away

Back

Preview of the back of card 3

Card 4

Front

A cell is a single unit while a battery is a collection of cells

Back

Preview of the back of card 4

Card 5

Front

Current and Time

Back

Preview of the back of card 5
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