Question

Green, blue, brown, gold color bands on resistors. Find its resistance?

Answer 1

The above problem is based on the color codes of the resistors. The size of the resistors in electronic circuits is so small that it becomes impractical to write the value of resistance on the resistors. The bands of the various colors are printed on the resistor to indicate the resistance. Each color shows a different numerical value. The numerical values of colors are coded in the format so that it gives the resistance of the resistors.

Complete step by step answer:
The colors are coded by using the four different colors to indicate the resistance. Fourth color from the left shows the tolerance value of the resistance, third shows the multiplier of the numerical value of resistance, second and first value shows the numerical value of resistance.

Let us assume WXYZ shows the color code of the resistor. The letter Z shows the tolerance value of the resistance, letter Y shows the multiplier of the numerical value of resistance in the form of power of 10, WX shows the numerical value of resistance.

The gold color shows the tolerance of the resistance and the value of tolerance corresponding to gold color is 5%.

The brown color shows the multiplier for numerical value of resistance and the multiplier corresponding to brown color is 10.

The numerical value of blue color is 6 and numerical value of green is 5, so the green and blue color shows the numerical value of resistance as 56.
The resistance of the resistor shown by the colors Green, blue, brown, gold is $\left( {56 \times 10 \pm 5\% } \right)\;\Omega$.
Thus, the resistance of the resistor shown by the Green, blue, brown, gold is $\left( {56 \times 10 \pm 5\% } \right)\;\Omega$.

Note: Always remember the order of the color coding to find the resistance of the resistors by using the color format. The gold and silver colors are used to show either the tolerance of resistance or multiplier for the numerical value of the resistance. The gold and silver colors used for multipliers show only the resistance of micro size resistors.