Mark Sciberras
April 22, 2020
12:55 pm
This Lesson Was Contributed By:
Mark Sciberras
This Lesson is For:
Lesson Duration:
80 mins.
What Should You Expect From This Lesson?
This lesson introduces resistors to students by explaining what is resistance while explains the usage of different types of resistors. Students will learn how to identify a resistor value from its colour code by using the resistor colour chart or by using a multimeter. Light dependent resistors (LDR’s) and thermistors are also covered in this lesson since these sensors are practically variable resistors.
How To Carry Out This Lesson At Home:
Students should go through the provided PowerPoint presentation (presented in pdf format) to acquire information about resistors. At the end of the lesson students should have learnt that:
• A resistor can be either fixed or variable.
• Resistors are produced in various types.
• Resistors are measured in ohms
• The meter used to measure resistance is called an ohmmeter
• Large size resistors are measured in Kilo Ohms and Mega Ohms
• 1,000Ω = 1KΩ
• 1000,000 Ω = 1MΩ
• The value of a fixed resistor can be found out from the resistor colour code chart.
• A fixed resistor has a tolerance.
• LDR and Thermistor are two sensor which function by creating a rapid resistance change.
Student can also do a self-assessment of what they have learnt by attempting to work out a worksheet related to resistors colour code
