Question

In the 5 band color resistor,which color bands are considered as significant digits?

• A. First band only
• B. First three bands
• C. First two bands
• D. Last band

Answer 1

The correct option is B First three bands

A 5-bandcolor resistor is represented as

$R=abc\times d\pm e\%$

Where, $a$ represents the $1^{st}$ significant digit, which is the first band color of resistor.

$b$ represents the $2^{nd}$ significant digit, which is the second band color of resistor.

$c$ represents the $3^{rd}$ significant digit, which is the third band color of resistor.

$d$ represents the $4^{th}$ significant digit, which is the fourth band color of resistor and this is the multiplier value used in formula.

$e$ represents the $5^{th}$ significant digit, which is the fifth band color of resistor and this is the tolerance value of resistor.