Current electricity Flashcards
What are the two components required for charge to move
A power source
A pathway for charge
What is current
The movement of electrical charge
What is current strength
Rate of movement of charge
What is charge measured in
Coulombs
What is current measured in
Amperes
What is time measured in
Seconds
What is potential difference measured in
Volts
What is work done measured in
Joules
What is a resistor that can vary their resistance called
Rheostat
What is resistance measured in
Ohms
How do you work out resistance
Volts over Amperes
How do you work out Current
Volts over Resistance
How do you work out voltage
Resistance x Amperes
What are the four factors that influence resistance
Length
Thickness
Material
Temperature
What happens to the current and potential difference when resistors are in SERIES
Current stays the same and potential difference is split
