Electricity Flashcards
1
Q
Potential difference
A
The work done per unit positive charge
2
Q
Current
A
Rate of flow of charge
3
Q
Ohm’s law
A
Current through a conductor is directly proportional to the potential difference over a conductor at constant temperature
4
Q
Resistance
A
A material’s opposition to the flow of electrical current
5
Q
Electrical power
A
The electrical power dissipated in a device is equal to the product of the potential difference across the device and the current flowing through the device
6
Q
Kilowatt hour
A
It is a unit of energy, and 1 kWh is the amount of energy used when 1 kilowatt of energy is used for 1 hour
7
Q
Emf
A
The total amount of energy supplied per coulomb of charge by the cell
8
Q
Internal resistance
A
The resistance inside a real battery
