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Electrical Charge
Arises when there is an excess or deficiency of electrons; can be positive or negative.
Coulomb's Law
A force exists between two point-source charges that is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Symbol for Charge
The symbol for charge is 'Q'.
Unit of Charge
The unit of electrical charge is Coulombs, abbreviated as 'C'.
Voltage Definition
Voltage is the difference in potential energy of the charges and is also known as electromotive force.
Symbol for Voltage
The symbol for voltage is 'V' or 'E'.
Unit of Voltage
The unit of voltage is volts, abbreviated as 'V'.
Voltage Source
A source of potential energy or electromotive force that produces voltage.
Types of Voltage Sources
Includes batteries, which convert chemical energy into electrical energy, and others like solar cells.
Conventional Current Flow
Current flow is considered to flow from the positive terminal to the negative terminal.
Electric Current
The movement or flow of free electrons from the negative end to the positive end of a material.
Symbol for Current
The symbol for current is 'I' or 'i'.
Unit for Current
The unit for current is Amperes, abbreviated as 'A'.
Current Mathematical Definition
Electrical current is defined as the rate of flow of charge, expressed as I = Q/t.
Electron Flow
Electrons flow from negative to positive when a voltage is applied.
Ampere
A unit of current; one ampere is defined as one coulomb of charge per second.
Note 
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