Term

Definition
The electric force between two point charges q and Q is given by
F= kqQ/r^2 


Term
Electric force experienced by charge from electric field 

Definition


Term
Electric field at a point 

Definition


Term

Definition
V = W/Q
Measured in Volts, or JC^1 


Term
Potential energy of charge 

Definition


Term
Electric field between parallel plates 

Definition


Term

Definition
1 eV = 1.6 x 10^19 C x 1 V
Electron charge per 1 volt of potential 


Term
A charge q in an electric field of magnitude E will experience a force of magnitude... 

Definition


Term
Equation for work done in moving a charge q across a potential difference V (delta V) 

Definition


Term
Law of conservation of charge 

Definition
1/2mv^2 + qV (A) = 1/2mv^2 + qV (B)
Left hand side is A, right hand side is B 


Term

Definition
The work per unit charge required to bring a positive test charge from far away to the point of interest. (Volts or JC1) 


Term
Equation for potential difference 

Definition
Work that must be done to bring a charge q from point A to point B is
W = q x (Vb  Va) 


Term

Definition
The amount of charge that moves through the crosssectional area of a wire per unit interval of time.
I=Q/t 


Term
Motion of electrons in current 

Definition
Electric field forces electrions to drift in one direction  overwhelming the electrons that collide with atoms and ions from the conductor itself, forcing them to 'drift' in one direction. This is current. 


Term

Definition
Potential difference across its ends divided by the current flowing through it. Given by:
R = V/I 


Term

Definition
When the temperature of a metallic conductor is kept constant, the current through the conductor is proportional to the potential difference across it.
I ∝ V
Graph of this will be straight line passing through origin. 


Term
Relationship between Resistance, Length and Area 

Definition
R ∝ L/A
The electric resistance of a wire is proportional its length L, and inversly proportional to the crosssectional area A. 


Term

Definition
The phenomena that occurs when electric current passes through a resistor; the potential at a point afterward is less than at a point before.
V = IR can be used to find this. 


Term
Equation(s) for Electric Power 

Definition
P = VI
P = RI^2
P = V^2 / R 


Term

Definition
Ratio of work done by nonelectrical forces, W, to a quantity of charge q that moves from one terminal of the battery to the other.
Measured in Volts. emf = W/q 


Term
Resistances of series circuits 

Definition
Are added up; Rtotal = R1 + R2 + R3 + ...
Can be replaced with one large resistor of R  total 


Term
Resistances of parallel circuits 

Definition
Circuit splits for the seperate paths with resistors. Law of conservation of charge means charge is same at beginning and end of split.
1/Rtotal = 1/R1 + 1/R2 + 1/R3 + ... 


Term

Definition
Devices used to measure the current (amperes) in a circuit. They must be in series to resistors, and must have zero resistance to work effectively (ideal). 


Term

Definition
A device used to measure the potential difference across a resistor. It must be connected in parallel to the resistor. Ideally, it should have infinite resistance; to take no current when connected to a resistor. 


Term

Definition
A device that is used to determine the currentvoltage characteristic of some device with resistance R.
Can affect the amount of current going from different parts of the circuit through adjustment. 

