Studied by 7 people
Drift Speed (v)
the average velocity attained by charged particles in a material due to an electric field.
Electrical Current (I)
the rate of flow of electric charges past a cross-section of a material
Charge q/Q
a scalar property of matter that can cause it to experience a force in an electromagnetic field
Coulomb
the charge carried by an electric current of one ampere in one second
Potential Difference V
is worked done per unit charge also known as voltage
Electronvolt
The amount of energy needed to move an electron through a potential difference of one voltÂ
Direct Current
a uniform current flowing in one fixed direction in a circuit
Electric Field
is a region of space in which an electric charge “feels” a force
Coloumbs Law
The attractive or repulsive electrostatic force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of their separation
Resistance (R)
is the ratio between potential difference across a component and the current flowing through it
The sum of the currents entering a junction always equals the sum of the currents out of the junction
Kirchhoff’s second law
The net potential difference in a closed loop is equal to zero
Ohms Law
For a conductor at a constant temperature, the current through it is proportional to the potential difference across it
Resistivity (p)
a measure of the resisting power of a specified material against the flow of an electric current
Power (P)
the rate at which energy is transferred
Internal Resistance (r)
the opposition to the flow of current offered by the cells and batteries themselves resulting in the generation of heat
Emf
the work done per unit charge in moving charge from one terminal of the circuit to the other
Note 
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