LESSON PLAN
FORM : 5 Science 2
DATE : 28th May 2015
LEVEL : Intermediate
TIME : 11.30 am
THEME :
-
TOPIC :
Chapter 3 : Electromagnetism
Subtopics : 3.3 Analysing Electromagnetic Induction
OBJECTIVES :
i) Analysing electromagnetic induction.
LEARNING OUTCOMES :
At the end of this lesson, students should be able to ;
i) Describe electromagnetic induction
ii) Indicate the direction of the induced current in a
a) straight wire
b) solenoid
iii) Explain factors that affect the magnitude of the induced current
iv) Describe applications of electromagnetic induction
v) Compare direct current and alternating current
MORAL VALUES : In life, we must do something consistently. We must try to avoid doing
something just when the teachers ask us to do it. Try to be independent in the learning process.
EDUCATIONAL EMPHASIS :
i) Thinking Skills : creative thinking skills and critical thinking skills.
ii) Thinking Strategies : conceptualizing, making decisions, problems solving.
iii) Science Process Skills : observing, making inferences, predicting, defining operationally.
INSTRUCTIONAL AIDS : Tube cardboard, wire coil, manila card, mounting board, printed
pictures.
PREVIOUS KNOWLEDGE : Students already learned about electromagnetism in Chapter 1
Science Form 3.
REFERENCES :
i) Badariah, H, Chang, S.L, Koay, K.C & Yew, K.L. (2006). Physics Form 5. Batu Pahat, Johor :
Zati Enterprise.
ii) Lim, P.C & Lim, C.C. (2011). Nexus SPM Physics Form 4 and Form 5. Petaling Jaya,
Selangor : Sasbadi Sdn.Bhd.
TEACHING PROCEDURE :
STAGE
INSTRUCTIONAL
LEARNING ACTIVITY
ACTIVITY
SET INDUCTION
- Teacher greets students and
(5 minutes)
asks whether they are okay or
- Students response to teacher.
not.
- Teacher brings along toys
- Students show happy
microphone and tell students
expression.
that they will have a singing
class today.
- Teacher asks one of the
students to come in front and
sing a song to the class.
- Students sing together.
- Teacher asks students the
- Students shout out loud
voice of the singer comes in
“sound waves”.
what form.
- Teacher asks students how
- Students do not know the
does the microphone will
answer.
produce current when it
receives sound waves.
- Teacher show off magnet
- Students tell it is magnet.
and asks students what is it.
- Teacher asks what is the
- Students do not know the
relationship between magnet
answer.
and sound waves
- Teacher tells the magnet in
- Students listen to teacher.
the microphone can create
current when it receives sound
waves from the voice of the
singer.
- Teacher tells the class they
will learn about
electromagnetic induction.
DEVELOPMENT
- Teacher pastes the definition
- Students sit nicely and
ACTIVITY 1
of electromagnetic induction
prepare to learn.
(15 minutes)
on the whiteboard.
- Teacher pastes two pictures
(wire across magnetic field
between two magnets and a
magnet towards a solenoid) on
the whiteboard.
-Teacher explains the
- Students listen to teacher.
definition using both pictures.
- Teacher asks students how to
- Students do not know the
increase the induced e.m.f
answer.
(and also the induced current).
- Teacher distributes hand-out
- Students receive notes.
on how to increase induced
e.m.f (and also the induced
current).
- Teacher explains what she
- Students listen to teacher.
has distributed.
-Teacher pastes the Faraday’s
Law on the whiteboard.
-Teacher bring along
- Students listen and taking
instructional aids (tube
notes.
cardboard, magnet, wire coil
as solenoid) to explain the
Faraday’s Law.
- Teacher pastes Lenz’s Law
(with two pictures) on the
whiteboard.
- Teacher explains Lenz’s
- Students listen to teacher.
Law.
- Teacher pastes Fleming’s
rules to find the direction of
induced current (Right-hand
Slap Rule also can be used).
- Teacher explains the rules.
- Students listen nicely.
- Teacher asks students to
- Students check out the notes.
check out on the notes given
before.
- Teacher asks students to do
- Students cooperate with
the example of the rules
teacher.
together.
- Teacher introduces the
- Students taking notes and
application of electromagnetic
listen.
induction (direct-current
generator and alternatingcurrent generator) from the
notes given.
- Teacher asks students to
check on others application of
electromagnetic induction.
ACTIVITY 2
- Teacher asks students to
(5 minutes)
make pair groups.
- Students get into groups.
- Teacher pastes questions on
whiteboard while students
making their groups.
- Teacher asks students to
- Students come in front to
stand up and says who want to
answer the questions.
sit, one of group members
must come in front and write
the answer on the whiteboard.
CONCLUSION
- Teacher recap all the lesson
(5 minutes)
for that day.
- Students response to teacher.
- Teachers reminds students to
remember the definitions and
the laws.
FOLLOW-UP ACTIVITY : Teacher asks students to complete the exercises in the text book.
SELF-EVALUATION :
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SUPERVISOR’S COMMENTS :
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SUMMARY
Electromagnetic Induction
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Relative motion of a conductor across magnetic field can be produced by :
(i) moving straight wire quickly across a magnetic field between two flat magnets.
(ii) moving a permanent magnet towards one end of a solenoid.
The size of the induced e.m.f (and also induced current) can be increased by :
(i) moving the wire or magnet faster,
(ii) using a stronger magnet,
(iii) increasing the length of the wire moving through the field (for example by bending the wire
into a coil or several turns)
Faraday’s Law
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Lenz’s Law
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Fleming’s Right Hand Rule
EXAMPLE 1 :
EXAMPLE 2 :
EXAMPLE 3 :
Application of Electromagnetic Induction
Direct Current (d.c)
Alternating Current (a.c)
1. Current flows in one direction only and has
1. Current flows to and fro in two opposite
constant magnitude.
directions.
2. Produces a constant voltage across bulb.
2.Produces an alternating voltage across the
bulb
voltage
voltage
0
0
Time
Time
Time