When we look around the electronic circuits. What is the most type of circuits form? The series circuit is one of popular. Why? We are finding the answer. My son experiment on the simple series circuit. To understand current flow and voltage across all devices in the circuit.

**Parts he will need**

- R2: 1K—more than 0.25 watts resistors, tolerance: 5%
- R1: 100 ohms—Same with R2.
- A variable
**DC power supply**or 10V Fixed regulator. - A Breadboard—with at least 30 rows, inexpensive and useful.
- Digital multimeter—voltmeter for finding the precise value of a voltage
- Wire jumpers—use on a breadboard.

## Make simple series circuit

What are the characteristics of a series circuit?

First of all, he builds the simple series circuit by using one resistor as Figure 1.

He installed all resistor**s** into the breadboard. Then, apply the 10V power supply to the resistor-1K as a complete circuit.

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*The simplest electronic circuit*

In the circuit diagram, the voltage drop across R1-1K is 10V. Because it is connected in parallel with the battery, 10V.

But how many current R1 is using?

## Series circuit current flow

Then, he measures a current of the resistor-1K as the Load of the circuit.

We will know the current that flows in the resistor.

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*Measure the current that flows through the resistor*

Next, he connects the 100 ohms resistor in under 1K resistor as below.

*Measure voltage at the series form*

He wants to know the voltage across each resistor.

So he uses the digital voltmeter measures voltage them.

The voltage across **various resistor are different voltage, as follows.**

- First, the voltage across R1-1K is
**9.28V** - Second, the voltage across R2-2K is
**0.933V** - And, the voltage across both resistors, R1+R2 are 9.28V and 0.933V =
**10.17V**

OR or this source voltage.

Then he measures current at various places.

As Figure 4 series circuit diagram

The Current flows **various resistors**R1 = 0.009A

R2 = 0.009A

R1+R2 = 0.009A

Thus, all parts have current equal 0.009A

**Also, here are a couple of related posts you should read, too:**

**Fixed voltage regulator working principle****Learning electronics for beginners with easy ways****Small Zener diode voltage regulator circuit with PCB**

Figure 5. He studies the series circuit by measuring voltage and current at various parts.

**Important features of the series circuit.**

- Electric current flowing through the same and have the same direction throughout the entire circuit.
- The total resistance of the circuit is equal to the sum of the individual resistances in the circuit together.
- The voltage across various parts of the circuit. When taken then combined will equal the voltage at the source.

What is more?

Learning by example circuit is best.

## Series circuit examples

**Current limiting resistor for LED and Load****How to use easily LEDs****Convert a galvanometer to voltmeter**

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