No color on a resistor indicates a tolerance of which percentage?

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Multiple Choice

No color on a resistor indicates a tolerance of which percentage?

Explanation:
The concept here is how resistor tolerance is indicated by color bands. Tolerance tells you how much the actual resistance may vary from its labeled value. When there’s no color band for tolerance, the default assumption for many resistors—especially older carbon composition types—is a ±20% tolerance. Color bands for tolerance use gold for ±5% and silver for ±10%, indicating tighter tolerances. Since there’s no tolerance band shown, you wouldn’t expect zero variation; you’d use the ±20% figure. So no color on the tolerance band corresponds to a 20% tolerance.

The concept here is how resistor tolerance is indicated by color bands. Tolerance tells you how much the actual resistance may vary from its labeled value. When there’s no color band for tolerance, the default assumption for many resistors—especially older carbon composition types—is a ±20% tolerance. Color bands for tolerance use gold for ±5% and silver for ±10%, indicating tighter tolerances. Since there’s no tolerance band shown, you wouldn’t expect zero variation; you’d use the ±20% figure. So no color on the tolerance band corresponds to a 20% tolerance.

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