working principle of electrical measuring instruments, electric engines
Learning objectives that are achieved at
this lesson (Subject Programme reference)
explain the operating principle of electrical measuring instruments, electric
By the end of this lesson, students will be able to:
·Know the structure of an electric
·Describe the structure of an electric motor;
·Recall the basic elements of a motor and explain their function;
·Explain the operating principle of an electric motor;
·Explain the operating principle of an electric engine;
·Explain the operating principleof Electrical measuring instruments;
how the force
on a current-currying conductor can be used to explain the motor
Left Hand Rule to find the direction of the force on a current-currying
loop in a magnetic field;
Know the composition of an electric motor;
Recall the basic elements of a motor and
explain their function;
Understand how the force on a
current-currying conductor can be used to explain the
Use Fleming’s Left Hand Rule to
find the direction of the force on a current-currying loop in a magnetic
Explain the operating
principle of an electric motor;
Explain the operating
principle of an electric engine;
Explain the operating
principleof Electrical measuring instruments;
Subject-specific vocabulary & terminology
magnetic field direction
Fleming’s Left Hand Rule
Magnetic field direction
Electrical measuring instrument
Useful set(s) of phrases for dialogue/writing
The thumb represents...
The first finger represents...
The second finger represents…
The magnetic force is perpendicular to...
The principle of electrical measuring instruments…
Differentiated poster-session ,
Collaborative Learning, Progressive Task with Digital resources
at the lesson
Safety, Consideration to others, Co-operation,
Opportunity for Life-Long Learning, Academic Integrity and Transparency,
Respect for Self and Others
8: magnetic fields; representation of fields by field lines; fields of
Grade 8: electrical equations: V = IR,
P = IV
Course of the lesson
stages of the lesson
activities at the lesson
the topic of day and spelling out the learning outcome they will possess
after the study.
1. Organizational moment to
acquaint students with the
theme of the lesson
objectives of the lesson
criteria of success for the lesson
plan of events for the lesson
the effect of a magnetic field on a current loop. This is a principle of a
simple direct current motor. Show the operational principle of this motor.
several turns of wire round a cork and hang it, from a clump, between the
poles of magnet as shown. Pass a current briefly through the coil.
ü Does the coil
turn the opposite way if you reverse the current?
are two ways to find the direction of rotation in the diagram:
Left Hand Rule for each side of the coil.
ØFind which end
of the coil becomes a N-pole. This end will be attracted to the S-pole of the
learners to divide in groups and study the operational principle of
electricity-measuring instruments, electric motorand a
based on a given model. The results of group works should be given in the
form of presentations to be defended by learners. Assessment criteria should
be agreed in advance.
Principle of an Electric Motor
Principle of Electrical measuring instruments
Principle of a generator.
study of the new material is based on the explanation of the topic by the
teacher accompanied by a presentation as a additional material.
Pair work. Filling the gap
At the end of
the lesson, learners reflect on their learning:
has been learned
is necessary to work on
the learners could evaluate their own work as well as the work of their
classmates using certain criteria.
– how do you plan to give more support? How do you plan to challenge the more
– how are you planning to check students’ learning?
and safety regulations
will watch the video
take information from the texts
by questioning and dividing in group
with varied difficulties
Assessment – how
are you planning to check students’ learning?
The output for
the worksheet will serve as assessment
the lesson will also serve as formative assessment.
Be careful when use the laser-coder
the lesson objectives/learning objectives realistic? Did all learners achieve
my planned differentiation work well?
I stick to timings?
changes did I make from my plan and why?
Use the space below to reflect on your lesson.
Answer the most relevant questions from the box on the left about your
What two things went really well (consider both
teaching and learning)?
What two things would have improved the lesson (consider
both teaching and learning)?
What have I
learned from this lesson about the class or achievements/difficulties of
individuals that will inform my next lesson?
Lesson plan Long-term plan unit:
Language objectives Subject-specific vocabulary & terminology magnetic field direction magnetic force current-carrying conductor
What happens? ü Does the coil turn the opposite way if you reverse the current?
Ending (38-40 min) At the end of the lesson, learners reflect on their learning: -
Were the lesson objectives/learning objectives realistic?