Physics, asked by annu777raut, 9 months ago

repeat the above experiment for silicon diode of different specifications​

Answers

Answered by Anonymous
4

Answer:

Explanation:

Experiment 1:

Identification, Specifications and Testing of R, L, C Components (color

codes), Bread Boards

RESISTOR:

Resistor is an electronic component whose function is to limit the flow of current in an

electric circuit.It is measured in units called ohms. The symbol for ohm is  (omega).

They are available in different values, shapes and sizes. Every material has some

resistance. Some materials such as Rubber, Glass and air have very high opposition to

current to flow .These materials are called insulators. Other materials such as Copper,

Silver and Aluminum etc. Has very low resistance, they are called Conductors.

IDENTIFICATION:-

1) Color Coded Resistor

Indicates multiplier Tolerance

Value

2) Printed Resistor

Color codes

The most common type has color bands to indicate its resistance. The code is a standard

one adopted by manufactures through their trade association, the electronic Industries

Association (EIA).

Color code and its value, multipliers Multipliers, Tolerance

Bl -- Black  0 100

Br -- Brown   1%

Br -- Brown  1 101

R -- Red   2%

R -- Red  2 102

G -- Gold  0.1,  5%

O -- Orange 3 103

S -- Silver 0.01,  10%

Y -- Yellow 4 104

No color   20%

G -- Green  5 105

Pink  High stability

B -- Blue  6 106

V -- Violet  7 107

G -- Gray  8 108

W -- White  9 109

1 CSE/IT- EE-Part-B Lab Manual Aurora’s Engineering College

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Resistor

Indicates multiplier Tolerance

Value

First color band tells the first significant figure of the resistors value.

Second color band indicates the second significant figure in the resistors value.

Third color band indicates the no. of zeros to add to the first two significant numbers

often called as multiplier.

Fourth color band indicates the tolerance.

Estimation of resistance value using color code for eg:a resistor has a color band of

Brown, Green, and Orange with a tolerance band Gold

Then

Br  1

G  5

O  3

First two colors is the value 15

Third color is multiplier, therefore x 103

i.e., 15 x 103 = 15000  15 k

Fourth band Gold implies Tolerance of  5%

Therefore 15 k  (5% of 15k)

Note:

By tolerance we mean that acceptable deviation or the actual value of the resistor may be

5% more or less then the coded value.

If the resistor contains 5 color bands ,then the first three color bands indicates the first

,second and third significant figure in the resistors value , the fourth color band is the

multiplier and the fifth color band indicates tolerance.

SPECIFICATIONS:

Carbon composition resistors are available from few ohms to several mega ohms.

Typical resistor wattage sizes are 1/8, 1/4, 1/2, 1, 2, 5, 10 and 20 (w) units, depending on

thickness of leads Wattage of resistors can be decided.

In writing the values of resistors, the following designation are used , K, M

K  kilo  103

M  Mega  106

Commonly available wire wound Resistors have resistance values ranging from 1 to

100K with power rating upto about 200W.

1 CSE/IT- EE-Part-B Lab Manual Aurora’s Engineering College

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All resistance materials have a change in resistance with temperature.

RT1= RT2 [1 +  (T1 – T2 )]

Where RT1 is resistance at T1

0C

 is the temperature coefficient

RT2 is resistance at T2

0C.

Temperature coefficient is important to designer so as to perform satisfactorily when the

circuit is exposed to temperature variations.

Voltage coefficient: Resistances other than wire wound have a slight change with the

applied voltage, generally it decreases with increase in voltage.

R1 –R2 1

Voltage coefficient = ---------------- * --------------- * 10 6

In PPM R2 (V1 - V2)

(Parts Per Million)

Testing:

Determine the resistance value of various resistors using color code and DMM .

Measure the resistance of each resistor and complete the below table.

S.NO Color Coded

Resistance Value

Color Coded

Tolerance

Measured

Value(using DMM)

Note:

1) The measured Resistance and the color coded resistance should agree with in the the

tolerance range of the resistor.

2) Do not touch both resistor leads while making the measurement, if you do so, DMM

will measure your body resistance as well as the resistor.

APPLICATIONS:

It is widely used in electronic circuits to limit the current.

1 CSE/IT- EE-Part-B Lab Manual Aurora’s Engineering College

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CAPACITORS:

It is a device which stores a charge. It does not pass direct current (dc) but will effectively

allow the flow of alternating current (ac). The reactance of a capacitor ‘C’ is dependent

on the freq of the ac signal and is given by

fc

X C

2

1

A capacitor ‘c’ when charged to a voltage has a stored energy of

2

1

CV2

Joules. A

capacitor essentially consists of two conducting plates separated by a dielectric medium.

Symbol:

Capacitance of a capacitor ‘c’ is given by

F

d

A

C

The SI unit of capacitance is Farad (F)

The Farad is the capacitance of a capacitor that contains a charge of 1 Couloumb when

the potential difference between its terminals is 1Volt and it stores

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