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We have a resistor with four color bands on it; red, red, orange and gold.

We have to find the resistance of the resistor.

For this we have a resistor color code chart.

Color | Digit | Multiplier | Tolerance (%) |

Black | 0 | 10^{0} | |

Brown | 1 | 10^{1} | ±1 |

Red | 2 | 10^{2} | ±2 |

Orange | 3 | 10^{3} | |

Yellow | 4 | 10^{4} | |

Green | 5 | 10^{5} | ±0.5 |

Blue | 6 | 10^{6} | ±0.25 |

Violet | 7 | 10^{7} | ±0.1 |

Grey | 8 | 10^{8} | |

White | 9 | 10^{9} | |

Gold | 10^{-1} | ±5 | |

Silver | 10^{-2} | ±10 | |

None | ±20 |

Here the first color is ‘red’.

The first color band on the resistor is the first significant digit of resistance

According to the chart, the significant digit for red is = 2

Second color band is the second significant figure of resistance.

Second color here is again red.

We know the significant digit for red is = 2.

The third color band is the decimal multiplier of the first two significant digits.

Third band here is orange.

From the chart, the multiplier value of orange is =${{10}^{3}}$

The fourth band gives the tolerance of the resistance.

Fourth band given here is gold.

Tolerance of gold =$\pm 5%$

Therefore, the resistance value of the resistor with color code red, red, orange, gold is

$22\times {{10}^{3}}\pm 5%\Omega $ .

Resistance is the property of an electric component to resist the flow of current. Resistance in a circuit can be defined as the ratio of voltage applied to the current flowing through the circuit. Unit of resistance is ohms$\left( \Omega \right)$.

A resistor limits the flow of electric current in an electric circuit.