Transcript Calculating The Resistor

Designed by Emilius K
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A resistor is a passive two-terminal electrical component that
implements electrical resistance as a circuit element.
The current through a resistor is in direct proportion to the
voltage across the resistor's terminals.
Practical resistors can be made of various compounds and
films.
The ohm (symbol: Ω) is the SI unit of electrical resistance,
named after Georg Simon Ohm.
Two typical symbols are as follows :
Band 1
Color
Band 2
1st digit 2nd
digit
Black
Band 3
Band 4
multiplier
tolerance
0
1
Brown
1
1
10
Red
2
2
100
Orange
3
3
1000
Yellow
4
4
10,000
Green
5
5
100,000
Blue
6
6
1,000,000
Violet
7
7
10,000,000
Gray
8
8
100,000,000
White
9
9
1,000,000,000
Gold
x 0,1
5%
Silver
x 0,01
10 %
The image below is a 30,000 ohm 5% resistor.
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For example, 3000 ohm 5 % means
5/100 x 3000 = 150 ohm, so
3000 ohm ± 150 ohm, equals to
Max value of Resistor is 3150 ohm, and
Min value of Resistor is 2850 ohm.
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What is the color for a 300 ohm 5 % ?
Orange, Black, Brown, Gold
What is the color for a 430 ohm 10 % ?
Yellow, Orange, Brown, Silver
What is the color for a 1 K ohm 10 % ?
Brown, Black, Red, Silver
 1.
What is the number of red, red, red, silver
?
 1. 2200 ohm 10 %
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What is the number of yellow, red, orange,
gold ?
 2. 42,000 ohm 5 %
 3.
What is the number of gray, white, yellow,
gold ?
 3. 890,000 ohm 5 %
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1. What is the color code for 2 K ohm 5 % ?
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2. What is the color code for 670 ohm 10 % ?
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3. What is the color code for 1500 ohm 10 % ?
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4. What is the number of blue, red, red, silver ?
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5. What is the number of blue, yellow, black, silver ?
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6. Find the tolerance for no. 1 – 5 !
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1. Red, Black, Red, Gold
2. Blue, Violet, Brown, Silver
3. Brown, Green, Red, Silver
4. 6200 ohm 10 %
5. 64 ohm 10 %
6.1. 1900 – 2100
6.2. 603 – 737
6.3. 1350 – 1650
6.4. 5580 – 6820
6.5. 57.6 – 70.4