the amount of charge that passes a point when 1 amp flows for 1 second
1 of 13
Ampere
One amp of current is a coulomb of charge being moved per second.
2 of 13
Electric Current
the rate of flow of charge
3 of 13
Ohms law
For a metallic conductor at a constant temperature, the current flowing through it, is directly proportional to the p.d. across it.
4 of 13
Resistance
This is the p.d placed over a device divided by the current R = v/I
5 of 13
P.d.
This is the electrical energy transferred into other forms, when a unit of charge is moved between two points.
6 of 13
The volt
V=IxR This is the potential between two points in a circuit, if one joule of energy is converted into other forms when i 1 coulomb of charge moves between the points.
7 of 13
Resistivity
this is the resistance of a sample of material of unit cross-a and unit length.
8 of 13
Superconductivity
When a metallic conductor behaves like it has zero resistance
9 of 13
Superconducting
The adjective used to describe materials that are below their transition temperature and therefore the resistance of which, is virtually zero
10 of 13
Transition Temperature
The temperature below which the resistance of the metal suddenly drops to zero.
11 of 13
The law of conservation of charge
electrical charge cannot be created or destroyed. As a consequence to this the current flowing to any point is equal to that flowing from it.
12 of 13
The electro-motive force or E.M.F of a cell
The energy transferred to other forms, throughout the circuit, when unit charge passes through the cell.
13 of 13
Other cards in this set
Card 2
Front
One amp of current is a coulomb of charge being moved per second.
Back
Ampere
Card 3
Front
the rate of flow of charge
Back
Card 4
Front
For a metallic conductor at a constant temperature, the current flowing through it, is directly proportional to the p.d. across it.
Back
Card 5
Front
This is the p.d placed over a device divided by the current R = v/I
Comments
No comments have yet been made