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Circuit Diagram - (Concept)

  • We have studied that an electric circuit comprises a cell (or a battery), a plug key, electrical component(s), and connecting wires. An electric circuit may have one or more electric elements such as bulbs (or lamps), cells, switches (or plug keys), metal wires, etc. 

  • Each element of a circuit has a specific function to play. For example, wires can be used to connect one element to the next. And a plug key or a switch can be used to either complete or break the closed path, thereby starting or stopping the current in the circuit.

  • A schematic diagram below shows an electric circuit comprising - a cell, electric bulb, and plug key

 

S.no.

Components

Symbols

1

An electric cell

2

A battery or a combination of cells

3

Plug key or switch (open)

4 

Plug key or switch (closed)

5

A wire joint

6

Wires crossing without joining

7

Electric bulb

8

A resistor of resistance R

9

Variable resistance or rheostat

10

Ammeter

11

Voltmeter

 

  • A circuit may be represented by a diagram that uses symbols for the elements used in the circuit, showing how the elements are connected to each other. Such a diagram is called a circuit diagram.

 

Exam Chapter
JEE FOUNDATION Electricity
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