1. Electric Charge:
- Electric charge is a fundamental property of matter. It is a measure of the amount of excess positive or negative charge a particle or object carries.
- Charge carriers can be electrons, protons, or ions. Electrons carry a negative charge, protons carry a positive charge, and ions can have either positive or negative charges depending on whether they have lost or gained electrons.
- Electric charge is measured in coulombs (C). One coulomb is equal to the charge carried by approximately 6.24 x 10^18 electrons.
- The total electric charge of an object or system is the algebraic sum of the charges of all the particles within it. If an object has an equal number of positive and negative charges, its net charge is zero.
- Electric charges interact with each other through electrostatic forces. Opposite charges attract, while like charges repel.
2. Electric Current:
- Electric current is the flow of electric charge through a conductor or circuit. It represents the rate at which electric charge moves past a point in a circuit.
- Current is measured in amperes (A). One ampere is equal to the flow of one coulomb of charge per second.
- For current to flow, there must be a complete circuit providing a conductive path for electrons or ions to move.
- The strength of an electric current depends on the number of charge carriers (usually electrons) moving, as well as their speed.
- Current is driven by a potential difference or voltage, which creates an electric field that causes the charges to move.
- Electric current can be direct current (DC), where the charge flows in one direction, or alternating current (AC), where the direction of charge flow periodically reverses.
In summary, electric charge is the property of matter related to the excess or deficiency of electrons or protons, while electric current is the movement or flow of these charges through a conductor or circuit. Charge is a fundamental property, while current represents the dynamic aspect of electricity in motion.
