Physics - Senior Secondary 3 - Simple A.C Circuits

Term: 1^st Term

Week: 2

Class: Senior Secondary School 3
Age: 17 years
Duration: 40 minutes for each of 5 periods
Date:
Subject: Physics
Topic: Simple A.C Circuits
Subtopics:
• Reactance and impedance
• Series circuit containing resistance, inductance, and capacitance
• Power in A.C circuits

SPECIFIC OBJECTIVES:

By the end of the lesson, students should be able to:

1. Understand the concepts of reactance and impedance.
2. Explain the behavior of a series A.C circuit containing resistance, inductance, and capacitance.
3. Calculate power in an A.C circuit.

INSTRUCTIONAL TECHNIQUES:

• Explanation
  • Demonstration
  • Questions and answers
  • Hands-on activity: Calculating power in A.C circuits

INSTRUCTIONAL MATERIALS:

• A.C power supply
  • Resistors, inductors, capacitors
  • Voltmeter and ammeter
  • Physics textbook
  • Whiteboard markers

INSTRUCTIONAL PROCEDURES

PERIOD 1 - 5

STEP 1: INTRODUCTION
• Review the concepts of peak and rms values from the previous week.
• Introduce reactance and impedance, explaining their roles in A.C circuits.

STEP 2: EXPLANATION
• Discuss the difference between reactance (capacitive and inductive) and impedance.