The Resistance and Tolerance of a Yellow, Violet, And Red Colour Coded Resistors Respectively are

Answer: C. 4.7 k, 20 %

The resistance and tolerance of a yellow, violet, and red colour coded resistors respectively are 4.7 k, and 20 %.

Solution

The resistor colour coding scheme prints coloured bands on the body of resistor to indicate the value of resistance.

In this scheme, each colour band position and colour will have a particular specification and significant value.

In the coloured band scheme, two-colour bands indicate the significant value of resistance, while the third colour band indicate the multiplier value. and fourth band if present indicates the tolerance of the resistor, if not present (or) indicated on the body of resistor, the tolerance of that resistor will be 20%. Resistor colour coding and their values are shown in below figure,

Colour	Digit	Multiplier	Tolerance
Black	0	1
Brown	1	101	1%
Red	2	102	2%
Orange	3	103
Yellow	4	104
Green	5	105	0.5%
Blue	6	106	0.25%
Violet	7	107	0.1%
Grey	8	108	0.05%
White	9	109
Gold			5%
Silver			10%
None			20%

Given colour coding for resistor a: Yellow→ (4)

Violet→(7)

Red→(×10²)

So, resistance R=47×10²=4700 =4.7 k

As there is no fourth band tolerance of resistor is 20%.

☛ Related Questions:

• A 3.3 kΩ resistor dissipates 0.25 W. The current is
• Current flows in a circuit when
• Which quantity remains the same on both sides of all transformers?