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Circuit Components and Their Symbols
Components are used in constructing electrical circuits.
Here’s every circuit symbol that can come up in your exams:
- OPEN SWITCH: Makes the circuit NOT complete and current cannot flow.
- CLOSED SWITCH: COMPLETES the circuit and allows current to pass.
- CELL: Indicates a single cell battery that provides the potential difference (voltage) needed for the current to flow.
- BATTERY: A combination of cells, supplying electricity to the circuit.
- LAMP: Illuminates when current passes through it.
- AMMETER: Used to MEASURE the CURRENT flowing through a circuit; it is always connected in SERIES.
- VOLTMETER: MEASURES the POTENTIAL DIFFERENCE (voltage) across a component and is connected in PARALLEL.
- RESISTOR: Indicates a component that opposes the flow of current, introducing RESISTANCE to the circuit.
- VARIABLE RESISTOR: A resistor whose RESISTANCE can be ADJUSTED. It is used to CONTROL CURRENT flow.
- THERMISTOR: A temperature-dependent resistor, meaning its RESISTANCE CHANGES with TEMPERATURE.
- LIGHT DEPENDENT RESISTOR (LDR): A resistor that CHANGES its RESISTANCE based on the LIGHT INTENSITY it's exposed to.
- DIODE: Allows CURRENT to flow in only ONE DIRECTION, ensuring components are protected from reverse current.
- LIGHT EMITTING DIODE (LED): Emits LIGHT when current flows through it and also allows current to flow in only ONE DIRECTION.
- FUSE: Acts as a SAFETY device that breaks the circuit if the CURRENT becomes too HIGH.
Circuit Components and Their Symbols
Components are used in constructing electrical circuits.
Here’s every circuit symbol that can come up in your exams:
- OPEN SWITCH: Makes the circuit NOT complete and current cannot flow.
- CLOSED SWITCH: COMPLETES the circuit and allows current to pass.
- CELL: Indicates a single cell battery that provides the potential difference (voltage) needed for the current to flow.
- BATTERY: A combination of cells, supplying electricity to the circuit.
- LAMP: Illuminates when current passes through it.
- AMMETER: Used to MEASURE the CURRENT flowing through a circuit; it is always connected in SERIES.
- VOLTMETER: MEASURES the POTENTIAL DIFFERENCE (voltage) across a component and is connected in PARALLEL.
- RESISTOR: Indicates a component that opposes the flow of current, introducing RESISTANCE to the circuit.
- VARIABLE RESISTOR: A resistor whose RESISTANCE can be ADJUSTED. It is used to CONTROL CURRENT flow.
- THERMISTOR: A temperature-dependent resistor, meaning its RESISTANCE CHANGES with TEMPERATURE.
- LIGHT DEPENDENT RESISTOR (LDR): A resistor that CHANGES its RESISTANCE based on the LIGHT INTENSITY it's exposed to.
- DIODE: Allows CURRENT to flow in only ONE DIRECTION, ensuring components are protected from reverse current.
- LIGHT EMITTING DIODE (LED): Emits LIGHT when current flows through it and also allows current to flow in only ONE DIRECTION.
- FUSE: Acts as a SAFETY device that breaks the circuit if the CURRENT becomes too HIGH.
