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    BEE Lab Practical - 1 & 2

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    chauhanshiv546
    This document discusses the basics of electrical engineering. It covers (1) identifying carbon resistors using color codes, where different color bands represent digits, multipliers, and tolerances; (2) symbols used in electrical engineering like those for direct current, alternating current, switches, meters, and components; and (3) an experiment to verify Ohm's Law by measuring voltage and current in a circuit and plotting the relationship.

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    BEE Lab Practical - 1 & 2

    Uploaded by

    chauhanshiv546
    6 views8 pages
    This document discusses the basics of electrical engineering. It covers (1) identifying carbon resistors using color codes, where different color bands represent digits, multipliers, and tolerances; (2) symbols used in electrical engineering like those for direct current, alternating current, switches, meters, and components; and (3) an experiment to verify Ohm's Law by measuring voltage and current in a circuit and plotting the relationship.

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    BEE lab practical_1 & 2

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    This document discusses the basics of electrical engineering. It covers (1) identifying carbon resistors using color codes, where different color bands represent digits, multipliers, and tolerances; (2) symbols used in electrical engineering like those for direct current, alternating current, switches, meters, and components; and (3) an experiment to verify Ohm's Law by measuring voltage and current in a circuit and plotting the relationship.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    6 views8 pages

    BEE Lab Practical - 1 & 2

    Uploaded by

    chauhanshiv546
    This document discusses the basics of electrical engineering. It covers (1) identifying carbon resistors using color codes, where different color bands represent digits, multipliers, and tolerances; (2) symbols used in electrical engineering like those for direct current, alternating current, switches, meters, and components; and (3) an experiment to verify Ohm's Law by measuring voltage and current in a circuit and plotting the relationship.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 8

    Basics of Electrical Engineering

    EXPERIMENT NO:-1

    AIM: - To study (A) Identification of carbon resistors from colour codes. (B) Symbols
    used in Electrical Engineering.

    (A) Identification of carbon resistors from colour codes.


    Carbon resistors are the most widely used fixed resistors in descrete circuits. Resistances
    of this type are available in the range from few ohms to hundred megaohms and typical
    power ratings of 1/8 watt to 2 watts. Due to their small size it becomes difficult to read
    the value of their resistance and tolerance printed on them. Hence to indicate the
    resistance and tolerance, resistors are coded with colour bands and they are universally
    accepted. Generally four colour bands and sometimes five colour bands are used as
    shown in fig 1 and 2 respectively.

    First two bands (A and B) denote the first and second digit of resistance value and the
    third band ( C ) indicates how many zeroes follow the first two digits. Tolerance is given
    by the fourth band (D). See table -1.
    For example, a resistor with following colour bands sequence

    Yellow- Violet- Orange- Gold

    Denotes a 47000  with  5%tolerance resistor.

    TABLE- 1

    COLOUR DIGIT MULTIPLIER TOLERANCE

    BLACK 0 1 -----

    BROWN 1 10  1%

    RED 2 100  2%

    ORANGE 3 1000 ------

    YELLOW 4 10000 ----

    GREEN 5 100000 -----

    BLUE 6 1000000 ------

    VIOLET 7 10000000 ------

    GRAY 8 ----- ------

    Mechatronics Department
    Basics of Electrical Engineering

    WHITE 9 ------ ------

    GOLD ---- 0.1  5%

    SILVER ---- ---  10%

    NO COLOUR ----- -----  20%

    TABLE-2

    COLOUR SIGNIFICANT MULTIPLIER WORKING


    VOLTAGE Vdc
    FIGURE

    BLACK 0 x1pF -----

    BROWN 1 x 10 p F 100

    RED 2 x 100 p F 250

    ORANGE 3 x 1kpF -----

    YELLOW 4 x 10 kpF 400

    GREEN 5 x 100 kpF ---

    BLUE 6 x 1 MpF 630

    VIOLET 7 ------ -----

    GRAY 8 x 0.01 pF -----

    WHITE 9 x 0.1pF -----

    TABLE- 3

    COLOUR TOLERANCE FOR TOLERANCE FOR


    CAPACITANCE10pF CAPACITANCE  10pF

    BLACK ---------  1 pF

    BROWN  0.1 p F -----

    RED  0.25 pF  0.1pF

    GREEN  0.5 pF  0.2 pF

    Mechatronics Department
    Basics of Electrical Engineering

    WHITE  1 pF  0.5 pF

    For example, a resistor with following colour bands sequence


    Brown- Black- Black- Brown - Red
    Denotes a 1000  with  2% tolerance resistor.

    (B) SYMBOLS USED IN ELECTRICAL ENGINEERING:

    SR. PARTICULAR SYMBOLS

    NO.

    1 Direct current

    2 Positive

    3 Negative

    4 Alternating current

    5 Single phase

    6 Three phase

    7 Crossed wires

    8 Connected wires

    9 Earth

    10 Fuse ( rewirable)

    11 Cartridge fuse

    Mechatronics Department
    Basics of Electrical Engineering

    12 Single pole switch

    13 Two way switch

    14 Push button switch

    15 Lamp

    16 Double pole switch

    17 Triple pole switch

    18 Knife blade, double pole,

    double throw switch

    19 Knife blade, triple pole,

    double throw switch

    20 Double pole, iron clad

    Main switch with fuse

    21 Triple pole, iron clad

    Main switch with fuse

    22 Reversing switch

    (double pole)

    23 Fixed resistance

    24 Variable resistance

    25 Inductive coil or reactor

    Mechatronics Department
    Basics of Electrical Engineering

    26 Variable inductive coil

    27 Choke coil

    28 Fixed condenser

    29 Variable capacitor

    30 Cell

    31 Battery

    32 Ampere meter

    (i) ac (ii) dc (iii) ac/ dc

    33 Voltmeter

    (i) ac (ii) dc (iii) ac / dc

    34 Wattmeter

    35 Single phase energy meter

    36 Transformer

    37 Auto transformer

    38 Diode

    39 Zener diode

    40 Tunnel diode

    Mechatronics Department
    Basics of Electrical Engineering
    41 Varactor diode

    42 Star connection

    43 Delta connection

    Mechatronics Department
    Basics of Electrical Engineering

    EXPERIMENT NO:-2

    Aim: To verify ohm’s Law.

    Circuit Diagram:

    Theory:

    Mechatronics Department
    Basics of Electrical Engineering

    Observation Table:

    Sr.No Voltage, V Current, I


    1
    2
    3
    4
    5
    6
    7
    8
    9
    10

    Calculation & Plot:

    Conclusion

    Mechatronics Department

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