Electricity Flashcards
What is a current
A measure of the flow of electrons around a circuit (amps)
What is Potential difference
It is the force driving the flow of electrons (voltage)
What is a circuit
Closed loop
What is Resitance
Everything that resists or opposes the flow of electrons
Which way does current flow in a circuit
From positive to negative
Potential difference/Voltage (V) =
Current (A) x Resistance (Ohms)
Why does a filament lamps Voltage and current graph bend
High temp = High resistance
What is a diode
Has very high resistance in one direction and very little in another
Example of directly proportional in electricity
When resistance stays the same, Voltage is directly Proportional to Current
What is always the same in a series circuit
Current is always the same
What is a series circuit
A electrical circuit with only one loop
What is a parallel circuit
a electrical circuit with more than one loop
What happens when a single part stops working or breaks in a series circuit
it will stop working
In a series circuit, what happens with the voltage/potential difference
It is shared with all components, (So if two of the same lamps and battery voltage is 12V, both will have 6V)
In a parallel circuit what happens to the PD/voltage
All components get all of the voltage
