Electricity Flashcards
(12 cards)
What is the equation for ohms law
V = IxR
What is current measured in
Amps
What is resistance measured in
Ohms the weird horse shoe sign called omega
What is the relationship between V and I for a fixed resistor
Directly proportional
What is potential difference measured in
Volts
Define resistance
It is a quantity which represents how limited current flow is
What is a good example of current flow
Either cars on a motor way or a pipe supplying water
In a circuit diagram what does the A in a circle stand for
It is the ammeter
In a circuit diagram what does the V in a circle stand for
Voltmeter
What is the difference between a power supply and a cell
A cell is fixed with how much charge is supplied and a power supply can be changed with how much charge is supplied
What is electric current
The amount of charge that passes a point per second
What is the equation for current
I = Q/T
