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1. What is the value of the electrical resistance of the resistor with color rings as follows:
a. Yellow, purple, red, and gold
b. orange, white, brown, and gold
c. green, blue, yellow, and silver
d. brown, black, green, and colorless
e. red, red, red, and gold

2. What color rings on the body of the resistor, the value of resistance mentioned below (ignoring the value of tolerance)?
a. 33 Ω; b. 200 kΩ; c. 750 Ω; d. 43 kΩ; e. 1.2 MΩ

Completion:
1. a. yellow = 4
purple = 7
red = 2
gold = ± 5%
write '4 'and '7', then follow these two numbers with 2 digits '0 '. The results obtained are 4700 Ω or 4.7 kΩ with a tolerance ± 5%

b. orange = 3
white = 9
brown = 1
gold = ± 5%
results obtained is 390 Ω with a tolerance ± 5%

c. Green = 5
blue = 6
yellow = 4
Silver = ± 10%
results obtained are 560,000 Ω or 560 kΩ with a tolerance ± 10%

d. brown = 1
black = 0
Green = 5
colorless = ± 20%
results obtained are 1000000 Ω or 1 MΩ with tolerance ± 20%

e. red = 2
red = 2
red = 2
gold = ± 5%
results obtained is 2200 or 2.2 kΩ with a tolerance ± 5%

2. a. 33 Ω = 33 x 100
3 is orange
3 is orange
0 is black
So ring colors are orange, orange, black.

b. 200 kΩ = 200,000 Ω = 20 x 104
2 is red
0 is black
4 is yellow
So ring the colors are red, black, yellow.

c. 750 Ω = 75 x 101
7 is purple
5 is green
1 is brown
So ring colors are purple, green, brown.

d. 43 kΩ = 43,000 = 43 x 103
4 is yellow
3 is orange
3 is orange
So ring colors are yellow, orange, orange.

e. 1.2 MΩ = 1200 kΩ = 1,200,000 Ω = 12 x 105
1 is brown
2 is red
5 is green
So ring colors are brown, red, green.

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9 comments

  1. The color code is daunting at first, but trust me, you'll be blowing through resistors, reading off values like a pro soon enough. Good luck everyone!

    ReplyDelete
  2. why black color is preferd as first in position

    ReplyDelete
  3. phew! this saved me from my mock exam!!! thanks1!

    ReplyDelete
  4. sivam.jawahar.Chennai, india1/25/2012 4:52 PM

    Hope this Electro Study Page gets POPULARITY AMOUNG ALL ELECTRONIC & ELECTRICAL HELP SITES

    ReplyDelete
  5. Thanks for your support, that give me a spirit of blogging

    ReplyDelete
  6. what is the colur code of 9ohms

    ReplyDelete
    Replies
    1. the colour code of 9 ohms is white black.

      Delete
  7. Resistor 9 Ohm is white, black, gold

    ReplyDelete