Electrical Symbols, Resistor, Inductor, Coil, Solenoid, Capacitor (For CBSE, ICSE, IAS, NET, NRA 2022)

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Electrical Symbols

Electrical Symbols
ResistorA resistor restricts the flow of charge. Uses include limiting the current passing through an LED, and slowly charging a capacitor in a timing circuit
A Resistor Restricts
Charging a Capacitor
CapacitorA capacitor stores electric charge. It can be used with a resistor in a timing circuit, for smoothing a supply (it provides a reservoir of charge) and can be used as a filter (blocking DC signals but passing AC signals) . Unpolarized capacitors usually have small values, less than .
A Capacitor Stores Electric Charge
DiodeA device which allows current to flow in only one direction.
Diode Device
Transistor NPN

Transistor PNP

  • A transistor amplifies current and can be used with other components to make an amplifier or switching circuit. This symbol is for a bipolar junction transistor (BJT) , the type you are most likely to use at first.
  • A transistor amplifies current and can be used with other components to make an amplifier or switching circuit. This symbol is for a bipolar junction transistor (BJT) , the type you are most likely to use at first.
Transistor NPN
MicrophoneA transducer which converts sound to electrical energy.
Converts Sound to Electrical Energy
Inductor, Coil, SolenoidA coil of wire which creates a magnetic field when current passes through it. There may be an iron core inside the coil. It can be used as a transducer converting electrical energy to mechanical energy by pulling on something magnetically
Inductor, Coil, Solenoid
Lamp (lighting)A transducer which converts electrical energy to light. This symbol is used for a lamp providing illumination, for example a car headlamp or torch bulb.
Lamp (Lighting)
Lamp (indicator)A transducer which converts electrical energy to light. This symbol is used for a lamp which is an indicator, for example a warning light on a car dashboard.
Lamp (Indicator)
MotorA transducer which converts electrical energy to kinetic energy (motion)
Converts Electrical Energy to Kinetic Energy (Motion)

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