Physics - Circuit Symbols + definitions

DIODE

An electrical component that allows current to flow in one direction only, preventing reverse flow.

CELL

A device that converts chemical energy into electrical energy, providing a source of power for circuits.

RESISTOR (FIXED)

A passive electrical component that resists the flow of electric current, causing a voltage drop.

VARIABLE RESISTOR

A resistor whose resistance can be adjusted manually or automatically, used to control current flow in a circuit.

LIGHT EMITTING DIODE (LED)

A semiconductor device that emits light when an electric current passes through it, commonly used for indicators and displays.

BATTERY

A device that stores and converts chemical energy into electrical energy, providing a source of power for circuits.

THERMISTOR

A type of resistor whose resistance changes significantly with temperature, used for temperature sensing and control in circuits.

OPEN SWITCH

A switch that is in the off position, preventing current from flowing through the circuit.

CLOSED SWITCH

A switch that allows current to flow through a circuit when in the closed position, completing the circuit.

HEATER

A device that converts electrical energy into heat to raise the temperature of a space or substance.

FILAMENT LAMP

A type of electric light that produces light by passing current through a thin wire filament, usually made of tungsten, which glows when heated.

MOTOR

A device that converts electrical energy into mechanical energy, often used to drive machinery or perform work in various applications.

FUSE

A safety device that protects electrical circuits by melting and breaking the circuit when the current exceeds a certain level.

AMMETER

An instrument used to measure the current flowing through a circuit, typically expressed in amperes.

VOLTMETER

An instrument used to measure the electrical potential difference between two points in a circuit.

LIGHT DEPENDENT RESISTOR (L.D.R)

A resistor whose resistance decreases with increasing incident light intensity, commonly used in light-sensing applications.