# Cara Menghitung Resistor

>Hello Sohib EditorOnline, in this journal article we will discuss the various methods of calculating the value of a resistor. Resistor is an electronic component that is found in almost every circuit. It is used to limit the flow of electrical current and to provide the correct amount of resistance needed for a circuit to function correctly. Resistor values are usually given in Ohms(Ω). In this article, we will explain the different methods of calculating resistor values.

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## Color Coding Method

The color coding method is the most commonly used method of calculating the value of a resistor. Every resistor has a color code on its body which indicates its value. The color coding method is simple and easy to use. There are four or five color bands on the resistor which can be used to calculate the value of the resistor.

The first band represents the first digit of the resistor value. The second band represents the second digit of the resistor value. The third band represents the multiplier or the number of zeros to be added to the two-digit value. The fourth band represents the tolerance or the percentage deviation from the actual value.

For example, if a resistor has the color bands brown, black, red, and gold, then its value can be calculated as follows:

Color Band Value
Brown 1
Black 0
Red 2
Gold 5%

Using the color coding method, the value of the resistor is 10 x 10^2 = 1000Ω or 1kΩ with a tolerance of ±5%.

### Examples of Resistor Color Codes

Below are some examples of resistor color codes and their corresponding values:

Color Bands Value Tolerance
Brown, Black, Black, Gold 100Ω ±5%
Green, Blue, Brown, Silver 560Ω ±10%
Yellow, Violet, Orange, Gold 4700Ω ±5%
Red, Red, Brown, Gold 220Ω ±5%

## Resistor Calculator

If you don’t want to use the color coding method, you can use an online resistor calculator to calculate the value of a resistor. There are many resistor calculators available online which can help you calculate the value of a resistor based on its color code or by entering the resistance values in Ohms.

One such online resistor calculator is the Resistor Color Code Calculator available at https://www.allaboutcircuits.com/tools/resistor-color-code-calculator/

## Parallel and Series Resistors

When resistors are connected together in a circuit, their values can be combined to form a new value. There are two types of connections that we will discuss: parallel and series connections.

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### Parallel Resistors

When two or more resistors are connected in parallel, their total resistance is equal to the reciprocal of the sum of their individual resistances.

For example, if two resistors with values of 100Ω and 200Ω are connected in parallel, their total resistance can be calculated as follows:

1/100 + 1/200 = 0.03

1/0.03 = 33.33Ω

Therefore, the total resistance of the two resistors connected in parallel is 33.33Ω.

### Series Resistors

When two or more resistors are connected in series, their total resistance is equal to the sum of their individual resistances.

For example, if two resistors with values of 100Ω and 200Ω are connected in series, their total resistance can be calculated as follows:

100 + 200 = 300Ω

Therefore, the total resistance of the two resistors connected in series is 300Ω.

## FAQs

### What is a resistor?

A resistor is an electronic component that is used to limit the flow of electrical current and to provide the correct amount of resistance needed for a circuit to function correctly.

### What are the units of resistance?

The units of resistance are Ohms(Ω)

### What is a color coding method of resistor?

The color coding method is the most commonly used method of calculating the value of a resistor. Every resistor has a color code on its body which indicates its value.

### How do you calculate the total resistance of resistors connected in parallel?

The total resistance of resistors connected in parallel is equal to the reciprocal of the sum of their individual resistances.

### How do you calculate the total resistance of resistors connected in series?

The total resistance of resistors connected in series is equal to the sum of their individual resistances.

### What is the tolerance of a resistor?

The tolerance of a resistor is the percentage deviation from the actual value.

That’s all for now, we hope this article has helped you understand the various methods of calculating the value of a resistor. Thank you for reading.