Resistor color code – digit value for BLUE In the standard 10-color resistor code (black to white), what base digit does the color BLUE represent when reading resistor values?

Difficulty: Easy

Correct Answer: 6

Explanation:


Introduction / Context:
The resistor color code encodes numerical values and tolerances with colored bands. Remembering each color’s digit helps you read resistors quickly without a calculator or chart.


Given Data / Assumptions:

  • The standard sequence is: black, brown, red, orange, yellow, green, blue, violet, grey, white.
  • Digits map from 0 through 9 in that order.
  • We are asked specifically for the digit corresponding to BLUE.


Concept / Approach:
Using a common mnemonic (for example, “BB ROY Great Britain Very Good Wife” or similar), blue is the seventh color in the 0–9 sequence starting at black=0. Counting: black 0, brown 1, red 2, orange 3, yellow 4, green 5, blue 6, violet 7, grey 8, white 9.


Step-by-Step Solution:
List the ordered colors with digits.Locate BLUE in the sequence → 6.Choose “6.”


Verification / Alternative check:
Any electronics handbook or resistor calculator confirms blue corresponds to 6 for significant figures and, in multiplier position, to 10^6.


Why Other Options Are Wrong:

  • 1 (brown), 2 (red), 4 (yellow): digits belonging to other colors; not blue.


Common Pitfalls:
Confusing digit values with tolerance colors (gold, silver) or reading bands in the wrong direction. Always start from the side with the tolerance band farthest from the edge.


Final Answer:
6

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