Current And Potential Difference Flashcards
What is current?
The rate of flow of charge
The flow of electrons / electric charge in a circuit
What Is current mesurer in?
Ampere
A
What is potential difference/ voltage ?
Th driving force that pushes the current round
The work done (j) per coulomb of charge that passes between two points in an electrical circuit
What is potential difference / voltage measured in?
Volts
V
What is resistance?
Anything in the circuit which slows the flow of current down
What is resistance measured in?
Ohm
How does resistance affect the current?
The greater the resistance across a component the smaller the current that flows (for a given potential difference across the component)
What is Charge measured in?
Coulombs
C
How do you wok out current?
Current = charge / time
I = Q/T
When does more charge pass around the circuit?
When a bigger current flows
What is the potential difference across an electrical circuit ?
The amount of energy that is transferred by that electrical component per unit of charge
