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Describe a series circuit.
Closed circuit
Current is the same
P.d is shared
Resistance is the sum of all the resistors
Describe a parallel circuit
Branched circuit
current is shared (sum of all)
pd is the same
total resistance is less than the smallest resistor
ex - 1/r
What is current?
Flow of electrical charge
What is the equation linking charge, current and time?
Charge = current x time
What happens if you increase the flow of charge?
The current increases also.
What two component’s is current dependant on?
The resistance and potential difference across the component.
If you lower the resistance…
the current increases
What is resistance?
A component that opposes current.
What is ohms law?
If the resistance is constant, current and pd are directly proportional to each other.
What is the equation for ohms law?
V = IR (pd = current x resistance)
What is the relationship between LDR and resistance?
If you increase the light intensity, resistance decreases.
and vice versa.
What is the connection between thermistor and resistance?
If you increase the temperature, the resistance decreases.
Note 
Flashcard (33)