Question

questions to draw circuit diagram to show symbols for different electrical components

Answer 1

In electronic circuits, there are many electronic symbols that are used to represent or identify a basic electronic or electrical device. They are mostly used to draw a circuit diagram and are standardized internationally by the IEEE standard (IEEE Std 315) and the British Standard (BS 3939). NO changes can be brought by the user on any electronic symbol, but the user is free to bring any changes in the architectural drawings like power source and lighting.

Electronic Symbols

The symbols for different electronic devices are shown below. Click on each link given below to view the symbols. Apart from the circuit symbols, each device is also designated a short name. Though these names are not approved as standard notations, they are commonly used by most people. These designations are also given in the list.

Wires | Power Supplies | Resistor | Capacitor|Diode | Transistor | Logic Gates | Meters |Sensors | Switches | Audio and Radio Devices |Output Devices

Wires

Electronic ComponentCircuit SymbolDescriptionWire



Wire Circuit Symbol

Used to connect one component to another.Wires Joined



Wires Joined Circuit Symbol

One device may be connected to another through wires. This is represented by drawing “blobs” on the point where they are shorted.

Unjoined Wires



Wires Not Joined Circuit Symbol

When circuits are drawn some wires may not touch others. This can only be shown by bridging them or by drawing them without blobs. But bridging is commonly practised as there will not arise any confusion.

 

Power Supplies

Electronic ComponentCircuit SymbolDescriptionCell



Cell Circuit Symbol

Used to provide a supply for a circuit.Battery



Battery Circuit Symbol

A battery has more than a cell and is used for the same purpose. The smaller terminal is negative and the larger one is positive. Abbreviated as ‘B’.

DC Supply



DC Supply Circuit Symbol

Used as a DC power supply, that is, the current will always flow in one direction.AC Supply



AC Supply Circuit Symbol

Used as AC power supply, that is, the current will keep alternating directions.Fuse



Fuse Circuit Symbol

Used in circuits where a probability of excessive current flows. The fuse will break the circuit if excessive current flows and saves the other devices from damage.Transformer



Transformer Circuit Symbol

Used as an ac power supply. Consists of two coils, the primary and secondary that are linked together through an iron core. There is no physical connection between the two coils. The principle of mutual inductance is used to obtain power. Abbreviated as ‘T’.

Earth/Ground



Earth Circuit Symbol

Used in electronic circuits to represent the 0 volts of the power supply. It can also be defined as the real earth , when it is applied in radio circuits and power circuits.

Resistor

Electronic ComponentCircuit SymbolDescriptionResistor



Resistor Circuit Symbol

A resistor is used to restrict the amount of current flow through a device. Abbreviated as ‘R’.

Rheostat



Rheostat Circuit Symbol

A rheostat is used to control the current flow with two contacts. Applicable in controlling lamp brightness, capacitor charge rate, etc.

Potentiometer



Potentiometer Circuit Symbol

A potentiometer is used to control the voltage flow and has three contacts. Have applications in changing a mechanical angle change to an electrical parameter. Abbreviated as ‘POT’.

Preset



Preset Circuit Symbol

Presets are low cost variable resistors that are used to control the charge flow with the help of a screw driver. Applications where the resistance is determined only at the end of the circuit design.

 

Capacitor

Electronic ComponentCircuit SymbolDescriptionCapacitor



Capacitor Circuit Symbol

Capacitor is a device that is used to store electrical energy. It consists of two metals plates that are separated by a dielectric. It is applicable as a filter, that is, to block DC signals and allow AC signals. Abbreviated with the letter ‘C’.

Capacitor – Polarized



Capacitor-Polarised Circuit Symbol

Capacitor can be used in a timer circuit by adding a resistor.Variable Capacitor



Variable Capacitor Circuit Symbol

Used to vary the capacitance by turning the knob. A type of variable capacitor is the trimmer capacitor that is small in size. The notations are all the same.

Diode

Electronic ComponentCircuit SymbolDescriptionDiode



Diode Circuit Symbol

A diode is used to allow electric current to flow in only one direction. Abbreviated as ‘D’.

Light Emitting Diode (LED)



LED Circuit Symbol

LED is used to emit light when a current is passed through the device.

Answer 2

Explanation:

I hope it will help you.