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:
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:
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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