How to Draw Circuit Diagrams for Electricity Experiments? An Introduction

 

How to Draw Circuit Diagrams for Electricity Experiments? An Introduction

Introduction:

            Usually electricity circuit diagrams are discussed by giving entire diagram as in text book. Due to this students face difficulty to remember diagrams. But if these diagrams are drawn after analysis of each component of instruments involved in circuit, it becomes easier.  For this, first discussion of electric symbol, use, special feature and series or parallel connection of electrical instruments is required.

Table  A   gives the list of  instruments involved up to H. S. C. level with name, electric symbol, use, series/ parallel connection and remark  about each instrument.

Table A

No.	Instrument	Electric Symbol	Use	Series/Parallel	Remark
1	Cell		Source	Series	+ , - terminals
2	Battery		Source	Series	+ , - terminals
3	Ammeter D.C.		Current measurement	Series	+ , - terminals
4	Voltmeter D.C.		Voltage measurement	Parallel	+ , - terminals
5	Galvanometer		Current detection	Series
6	Key		On-Off  switch	Series
7	Resistor		To control Current	Series/Parallel	Fixed resistance
8	Rheostat		To vary current	Series	Variable Resistance
9	Wire		Circuit Connection	Series/Parallel
10	Metal strip		Part of Instrument	Series/Parallel
11	Ground		Earthing	Series/Parallel
12	Diode		Unidirectional Device	Series/Parallel

 Electric  Source

Fig A

     Every electricity experiment requires  electric source. This is supplied by battery. The set given in fig A is consisting of battery, key and rheostat. Terminals  A and B are connected to circuits of every experiment.

Wheatstone's Bridge:

Let us see the circuit diagram of  Wheatstone's Bridge as in Fig B.

Fig B

Wheatstone's Bridge diagram steps:

1.  First draw L shaped metal strips on two ends of page  and

     rectangular strip in middle as in fig B.

2.  Draw  line by joining A & B representing 1 m wire, then connect battery,

     key , rheostat to A & B. Draw resistance R in left gap, Unknown resistance

     X in right gap.

3.  Connect midpoint of strip to galvanometer and other end of

     galvanometer    to jokey. Jokey touches at C on wire as null point. Label AC

      as l_r and CB as l_x .

4.           Find      X = R l_x / l_r .

5.  This is required diagram of Wheatstone's bridge experiment.

Potentiometer:

Let us see the circuit diagram of  Potentiometer as in Fig C.

Fig C

Potentiometer diagram steps:

1.  Take A& B points at first & fourth line in middle of half page.

2.  Then draw four lines of 12 cm length and join ends as in  shown fig C.

3.  Connect battery, key, rheostat between A & B.

4.  Connect  +ve of Cell to A and – ve of Cell to galvanometer, Other end

      of galvanometer to jokey.

5.  Jokey touches wire at C representing balancing point.  Compare EMF by 

                   E₁ /  E₂ =  l₁ /  l₂

6.  This is required diagram of Potentiometer Experiment.

In my blog related to

" How to Draw Diagrams in Physics  by Smarter Techniques" ,

 I have  discussed about general guide line to draw diagrams on A4 sheet.

Do you want to know

"How to Draw Circuit Diagrams for Electricity Experiments? An Introduction"

  using given guide lines .

Let us see  from following video for actual smarter method of drawing diagram .