objectives(s) that this lesson is contributing to
explain the definition of internal resistance
Based on the experiment on the measurements of the voltage analyze the
influence of the internal resistance on voltmeter readings in a closed
Develop attention, the ability to creatively and logically analyze
experimental data, collect electrical circuit
will achieve the goal if they
the influence of the internal resistance on the voltage drop across the
the reason that battery has an internal resistance;
the better case of being low or high internal resistance;
Key terms and concepts:
operation of external forces, external and internal resistance, external and internal circuit phase, electromotive force of the current source, Ohm's law for the circuit phase and for the entire circuit.
Grade 8: sources
of direct current; the electric current; the electrical elements and their
notation; series and parallel connection of conductors;
Course of the
activities at the lesson
of the lesson theme and the LO of the lesson;
activity: In order to revise last topic teacher ask student questions and
they answer them orally.
is an E.M.F.?
does mean 1.5V written on a cover of the battery?
is the unit of E.M.F.?
is the formula for the E.M.F?
of this activity is to focus student attention on new lesson and revise the
main part of the lesson starts with the practical task. Students will be
given all the materials and equipment and their task is to investigate the
voltmeter reading in different cases.
teacher discuss with students safety rules during working with electric
this teacher divide the class into 4 small groups and each group provided
with the needed staff and worksheet.
discuss in their groups and read the worksheet and get familiar with the
procedures of the practical task.
laboratory work, analyze the data and draw the appropriate conclusions.
order to verify their answers groups watch a video https://www.youtube.com/watch?v=k077CwKGiwk
clip and discuss
their answers. It is important to yell them before they start watching a
video that they should start watch from 8.30 min up to 17.00 min.
this activity a whole class discussion takes place. Groups share with their
answers one by one. Teacher ask questions and complete their answers by
discussing with them the reason why internal resistance is exist in a e.m.f.
source, the case when the internal resistance is zero, internal resistance of
some batteries etc.
Today in class I learned .
Now I can …
It was interesting…
The knowledge gained today in the
lesson will be useful…
– 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
of Technics of Safety at physics room
Were the lesson
objectives/learning objectives realistic? Did all learners achieve the LO?
If not, why?
Did my planned
differentiation work well?
Did I stick to
What 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 lesson.
two things went really well (consider both teaching and learning)?
two things would have improved the lesson (consider both teaching and
What have I
learned from this lesson about the class orachievements/difficulties
of individuals that will inform my next lesson?
Lesson Plan Long-term plan unit:
The main part of the lesson starts with the practical task