Electricity Definitons Flashcards
Define current
The rate of flow of charge.
Define potential difference (voltage)
The work done per unit positive charge
Define power
The rate of doing work
Define resistance
A materials opposition to the flow of electric current.
Give the definition of electric charge
One coulomb is the amount of charge passing a cross-section of a conductor in one second, when the current is one ampere.
How many electrons make up one coulomb?
6,25 x 10^18
What is the charge of an electron?
-1,6 x 10^-19
When a wire conducts at a current of 1A, how many electrons pass a point and in how many seconds do these electrons pass the point in? [2]
- 6,2 x 10^18
- one second
State Ohms law;
The current through a conductor is directly proportional to the potential difference across the conductor at a constant temperature.
Define the Ohm;
A conductor has a resistance of 1 ohm if the current is 1 ampere when a potential difference of 1 volt is maintained between its ends.
