Question

the coloured rings marked on a carbon resistor are red , red , red and silver what is the tolerance of this resistor​

Answer 1

Answer:

The required tolerance of the resistor is 10%.

Explanation:

Given :

The colored rings marked on a carbon resistor are red, red, red and silver.  

To find :

the tolerance of the resistor.

Solution :

Tolerance is defined as the percentage of error in the resistance of the resistor.

• Resistor color códes :

⇒ The first two bands indicate the value of the resistance.

⇒ The third band, simply indicates the number of zeros. (multiplier)

⇒ The fourth band indicates the tolerance.

$\boxed{\begin{array}{|c|c|c|c|}\cline{1-4}\sf Colour &\sf Number&\sf Multiplier&\sf Tolerance\\\cline{1-4}\sf Black&\sf 0&\sf 1&\\\cline{1-4}\sf Brown&\sf 1&\sf 10^1 &\sf \\\cline{1-4}\sf Red&\sf 2&\sf 10^2& \\\cline{1-4}\sf Orange&\sf 3&\sf 10^3& \\\cline{1-4}\sf Yellow&\sf 4&\sf 10^4&\\\cline{1-4}\sf Green&\sf 5&\sf 10^5 &\sf \\\cline{1-4}\sf Blue&\sf 6&\sf 10^6& \\\cline{1-4}\sf Violet&\sf 7&\sf 10^7&\\\cline{1-4}\sf Gray&\sf 8&\sf 10^8&\\\cline{1-4}\sf White&\sf 9&\sf 10^9 &\sf \\\cline{1-4}\sf Gold& &\sf 10^{-1}& \sf 5\% \\\cline{1-4}\sf Silver& &\sf 10^{-2}& \sf 10\% \\\cline{1-4}\sf No \: colour & & & \sf 20\% \\\cline{1-4}\end{array}}$

Given colors :

1) Red - 2

2) Red - 2

3) Red - 10² (Multiplier)

4) Silver - 10% (Tolerance)

So, the tolerance of this resistor is ±10%.

• The resistance is 22 × 10² Ω ± 10%.