Physics - Senior Secondary 2 - Electromagnetic Field

Electromagnetic Field

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TERM: 3RD TERM

WEEK: 8

Class: Senior Secondary School 2
Age: 16 years
Duration: 40 minutes for each of 5 periods
Date:
Subject: Physics
Topic: Electromagnetic Field
Subtopics:
• Magnetic Force on a Charge Moving in a Magnetic Field
• Concept of Electromagnetic Field
• Interaction Between Magnetic Field and Currents:

  • Current-Carrying Wire in a Magnetic Field
  • Current-Carrying Solenoid in a Magnetic Field
  • Applications of Electromagnetic Field:
  • Electric Motor
  • Moving Coil Galvanometer

 

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

  1. Describe the force exerted on a charged particle moving in a magnetic field.
  2. Explain the concept of the electromagnetic field and its applications.
  3. Investigate the interaction between magnetic fields and currents in a wire and solenoid.
  4. Understand how electric motors and moving coil galvanometers work.

 

INSTRUCTIONAL TECHNIQUES:
• Explanation
• Demonstration
• Hands-on Activity: Investigating the effect of passing current through a solenoid in a magnetic field
• Questions and Answers
• Video clips on electromagnetic fields and applications

 

INSTRUCTIONAL MATERIALS:
• Wire coil (solenoid)
• Power source
• Compass
• Moving coil galvanometer
• Physics textbook
• Whiteboard markers
• Videos on electromagnetic fields and electric motors

 

INSTRUCTIONAL PROCEDURES
PERIOD 1-5

STEP 1: INTRODUCTION
• The teacher asks students to recall what they know about magnetic fields and currents.
• Students are encouraged to think about how magnets and electric currents interact.

STEP 2: EXPLANATION
• The teacher explains the force experienced by a charged particle moving in a magnetic field.
• Introduction to the concept of electromagnetic fields: A magnetic field generated by an electric current.
• The teacher demonstrates the interaction between a current-carrying wire and a magnetic field.

STEP 3: DEMONSTRATION
• The teacher shows how current passing through a solenoid generates a magnetic field.
• The teacher explains the working of electric motors and moving coil galvanometers.

STEP 4: HANDS-ON ACTIVITY
• Students will carry out experiments to investigate the effect of passing current through a solenoid in a magnetic field.

STEP 5: NOTE TAKING
• The teacher writes key points on the board, including the definition of an electromagnetic field and how electric motors work.

NOTE
• An electromagnetic field is created when an electric current flows through a conductor, generating a magnetic field.
• Electric Motor: A device that uses electromagnetic induction to convert electrical energy into mechanical energy.
• Moving Coil Galvanometer: A device that uses the deflection of a coil in a magnetic field to measure current.

 

EVALUATION

  1. What is the force on a charged particle moving in a magnetic field?
  2. Explain how a current-carrying wire interacts with a magnetic field.
  3. How does a moving coil galvanometer work?
  4. Describe the function of an electric motor.

CLASSWORK:
• Explain how an electromagnetic field is formed.
• Write the working principle of a moving coil galvanometer.

 

CONCLUSION:
• The teacher reviews the answers and provides feedback.
• Students are encouraged to consider real-life applications of electromagnetic fields, such as motors and transformers.