## 4-Band Resistor Color Code Calculator

## FAQs

**What is the color code of a 4 band resistor?** The color code of a 4-band resistor consists of four colored bands. The first two bands represent the first two significant digits of the resistance value, the third band is the multiplier, and the fourth band indicates the tolerance.

**How do you solve a 4 band resistor?** To solve a 4-band resistor:

- Identify the colors of the first two bands and use the color code chart to find their corresponding digits.
- Identify the color of the third band to determine the multiplier.
- Identify the color of the fourth band to determine the tolerance.
- Combine the first two digits and multiply by the multiplier to get the resistance value, then apply the tolerance.

**What is the color code for a 4.7 ohm resistor?** The color code for a 4.7 ohm resistor is:

- 1st band: Yellow (4)
- 2nd band: Violet (7)
- 3rd band: Gold (×0.1)
- 4th band: Gold (±5% tolerance)

**What color is a 4 ohm resistor?** The color code for a 4 ohm resistor is:

- 1st band: Yellow (4)
- 2nd band: Black (0)
- 3rd band: Black (×1)
- 4th band: Gold (±5% tolerance)

**How to memorize resistor color code?** A common mnemonic to remember the resistor color code is: **“BB ROY of Great Britain had a Very Good Wife”** which stands for:

- Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White.

**What is the difference between a 4-band and 5-band resistor?** A 4-band resistor has two significant digits, a multiplier, and a tolerance band. A 5-band resistor has three significant digits, a multiplier, and a tolerance band, which allows for more precise resistance values.

**How do you calculate 4 resistors?** To calculate the total resistance of four resistors:

- In series: Rtotal=R1+R2+R3+R4R_{total} = R_1 + R_2 + R_3 + R_4Rtotal=R1+R2+R3+R4
- In parallel: 1Rtotal=1R1+1R2+1R3+1R4\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} + \frac{1}{R_4}Rtotal1=R11+R21+R31+R41

**How to calculate resistor with color?** Use the color bands to identify the digits, multiplier, and tolerance. Combine the digits, multiply by the multiplier, and apply the tolerance to get the resistance value.

**What if a resistor has no 4th band?** If a resistor has no 4th band, it usually means it has a default tolerance of ±20%.

**What is the color code 4 band on a 2.2 ohm resistor?** The color code for a 2.2 ohm resistor is:

- 1st band: Red (2)
- 2nd band: Red (2)
- 3rd band: Gold (×0.1)
- 4th band: Gold (±5% tolerance)

**What color is a 2.7 k resistor?** The color code for a 2.7 kΩ resistor is:

- 1st band: Red (2)
- 2nd band: Violet (7)
- 3rd band: Red (×100)
- 4th band: Gold (±5% tolerance)

**What color is a 1.2 ohm resistor?** The color code for a 1.2 ohm resistor is:

- 1st band: Brown (1)
- 2nd band: Red (2)
- 3rd band: Gold (×0.1)
- 4th band: Gold (±5% tolerance)

**How to read 4 band resistor color code?** Identify the colors of the first two bands for the significant digits, the third band for the multiplier, and the fourth band for the tolerance. Combine the significant digits and multiply by the multiplier to get the resistance value, then apply the tolerance.

**How do I tell what resistor I have?** Use the color code on the resistor to determine its resistance value and tolerance.

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