# Basics of Electronics – Current & Resistor

Lesson Details
What is current? What is resistance? How to calculate the resistance of a resistor using color code?

Activities:

• Calculating the resistance of 5 unknown resistors using color code.
Classroom Bundle Used: STEM Classroom Bundle, STEM Mini Classroom Bundle
Prerequisites: Voltage

## Lesson Overview

Students will learn the following things:

• What is current, resistance, conductors and resistor?
• What is units and symbols, and why they important?
• How to identify the value of the resistor using color code.

## Material Required

1 set of the following material per group of 3-5 students:

Component Image Quantity Available in Bundle
220 Ohm Resistor 1
1 kOhm Resistor 1
4.7 kOhm Resistor 1
10 kOhm Resistor 1
1 MOhm Resistor 1

## Lesson Outline

Introduction and recap of the previous class - 5 minutes
Pump water system - 15 minutes
• Why it is important to have a closed-loop?
• How water is analogous to charge?
• The flow of water is analogous to the flow of charge (current).
• The direction of flow.
Conductor and their importance - 5 minutes
Resistance - 10 minutes
• What is resistance
• How it affects the flow of charge
Units and Symbols - 5 minutes
• Definition
• Units and symbols for voltage, current, and resistance.
Resistors - 10 minutes
• Definition
• How to measure its value using color code.
Activity - 15 minutes

Measuring resistance of 3-4 different resistors using color code.