Voltage, Current, Resistance

Voltage is the electric potential difference between two points in a circuit, measured in volts (V). It represents the energy per unit charge available to move electrons through a circuit.

Current is the flow of electric charge in a circuit, measured in amperes (A). It represents the rate at which charge is flowing.

Resistance is the opposition to the flow of electric current, measured in ohms (Ω). It determines how much current will flow for a given voltage.

An insulator is a material that does not allow electric current to flow easily. Examples include rubber, glass, and plastic.

A conductor is a material that allows electric current to flow easily. Examples include metals like copper and aluminum.

Voltage (V) = Current (I) x Resistance (R) or V = I x R.

Current (I) = Voltage (V) ÷ Resistance (R) or I = V ÷ R.

Resistance (R) = Voltage (V) ÷ Current (I) or R = V ÷ I.

As resistance in a circuit increases, the electric current decreases, assuming voltage remains constant.

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.