Color code practice: What are the correct 4-band color stripes for a 4,700 Ω resistor with ±10% tolerance?

Introduction / Context:
Reading resistor color codes quickly is a vital technician skill. For a 4-band resistor, the first two bands are significant digits, the third is the power-of-ten multiplier, and the fourth is the tolerance. Here we map a specified resistance and tolerance back to its color stripes.

Given Data / Assumptions:

• Target resistance: 4,700 Ω (i.e., 4.7 kΩ).
• Tolerance: ±10%.
• Standard color-digit mapping applies.

Concept / Approach:
Express the value in two significant digits times a power of ten: 4,700 Ω = 47 × 10^2. Then map 4 → yellow, 7 → violet, multiplier 10^2 → red, tolerance ±10% → silver.

Step-by-Step Solution:

Verification / Alternative check:
If tolerance were ±5%, the last band would be gold, not silver. If the value were 47 kΩ (47 × 10^3), the third band would be orange (10^3), illustrating the importance of the correct multiplier.

Why Other Options Are Wrong:

• Yellow, violet, red, gold: Gold is ±5%, not ±10%.
• Yellow, violet, orange, gold: Multiplier 10^3 and tolerance ±5%—this encodes 47 kΩ ±5%, not 4.7 kΩ ±10%.
• Orange, violet, red, silver: First digit orange is 3, not 4; would encode 3.7 kΩ ±10% if the rest matched.

Common Pitfalls:

• Mismatching multiplier color (red vs orange) leading to decade errors.
• Confusing gold and silver tolerances.

Final Answer:
yellow, violet, red, silver