Question

A carbon resistor has coloured strips as brown, green, orange and silver respectively. The values of resistance is?
A)15 kΩ + 10%

B)15 kΩ ± 5%

C)15 kΩ ± 20%

D)10 kΩ ± 5%​

Answer 1

Given : A carbon resistor has coloured strips as brown, green, orange and silver respectively.

To Find :  values of resistance

A)15 kΩ ± 10%

B)15 kΩ ± 5%

C)15 kΩ ± 20%

D)10 kΩ ± 5%​

 Solution:

4 Band

1st two colors are digit

3rd color is 10 raised to power multiplier

Then tolerance  ( gold . silver / none )

Color Digit Multiplier  

Black 0        10⁰  

Brown 1        10¹

Red   2         10²

Orange 3         10³  

Yellow 4         10⁴  

Green 5         10⁵  

Blue 6         10⁶  

Violet 7         10⁷    

Grey 8         10⁸  

White 9           10⁹  

Tolerance (%)

Gold      5

Silver       10

(none)     20

brown, green, orange and silver

1              5          10³           ± 10%

Hence 15 * 10³    ± 10%

= 15 k  ± 10%

values of resistance  is  15 k  ± 10%

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