electricty and voltage in circuits Flashcards
What is current?
A measure of the flow of electrons around a circuit
What is current measured in?
Amps
What is potential difference?
The force driving the flow of electrons around a circuit
Which way do electrons flow in conventional current?
Positive to negative
What are the units for resistance?
Ohms
What equation links voltage current and resistance?
v= i x r (im very rude)
Potential difference and voltage…
are the same thing
What do diodes do?
Only allow current to flow in one direction around the circuit
What is charge?
A measure of the total current that flowed within a period of time
What is the equation for charge?
Charge = current x time
What are the units for charge?
Coulombs
What is the symbol formula for charge?
Q = It
What’s the difference between parallel and series circuits?
Series circuits have one loop, parallel circuits have more than one loop
In a series circuit the potential difference (voltage) of a battery is…
Shared across all components
In a series circuit the current is…
The same everywhere
What is ohms law?
Voltage = current x resistance
All the components in a parallel circuit…
Have the same potential difference (voltage)
