# Lesson Notes By Weeks and Term - Senior Secondary 1

Field

Term: 2nd Term

Week: 2

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject:      Physics

Topic:-       Field

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Explain the meaning of field
2. State and explain the types of field
3. State the properties of the magnetic line of force
4. State the properties of the electric line of force

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

 PRESENTATION TEACHER’S ACTIVITY STUDENT’S ACTIVITY STEP 1 INTRODUCTION The teacher reviews the previous lesson on thermal expansion of solids Students pay attention STEP 2 EXPLANATION He defines field. He states and explains the types of field Students pay attention and participates STEP 3 DEMONSTRATION He states the properties of the magnetic and electric line of force Students pay attention and participate STEP 4 NOTE TAKING The teacher writes a summarized note on the board The students copy the note in their books

NOTE

FIELD

Description and Properties of Field

Field can be defined as a region or space under the influence of some physical agency such as gravitation, magnetism and electricity.

Types of Field

There are two types of field; scale field and vector field

i, Scalar field: A scalar field is a field that has a magnitude but no direction e.g. temperature, energy and density.

ii, Vector field: A vector field is a field that have both magnitude and direction e.g. gravitational, magnetic and electric field.

GRAVITATIONAL FIELD: Gravitational field is a force field that influences the motion of an object in the space where it operates without coming in contact with the object existing in the earth’s gravitational field.

MAGNETIC FIELD: A magnetic field is the region or space around a magnetic material in which the influence of the magnet force can be felt or detected.

POLE: The pole of a magnet is the portion of the magnet where its magnetic attraction appears to be strongest.

PROPERTIES OF MAGNETIC LINE OF FORCE.

a, They originate from North pole and end in a South pole

b, Two lines of force do not cross each other

c, Where the line of forces are close together, the intensity of the field is greater.

d, Where the line of force are widely separated the intensity of  the field is less.

ELECTRIC FIELD

This is a region where an electric charge exerts a force on another charges.

The line of electric field is drawn in such a way that direction at any point gives the direction of the electric field

PROPERTIES OF ELECTRIC LINE OR FORCE

1, They originate from positive charges and terminate at the negative charges.

2, Like charges repel while unlike charges attract.

3, They are in the state of tension.

4, The line of force never cross each other

EVALUATION:   1. Define field

1. State and explain the types of field
2. State three properties of
3. the magnetic line of force
4. the electric line of force

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively