Lesson plan

Long-term plan unit: 10.3A - Direct current

School:

Date:

Teacher name:

Grade: 10

Number present: 7

absent:

Theme of the lesson №82

Current electricity. Ohm's law for a section of circuit. Mixed connection of conductors.

Learning objectives that are achieved at this lesson (Subject Programme reference)

to use Ohm's law for a circuit unit with mixed connection of conductors;

Lesson objectives

- know Ohm's law and apply Ohm's law in solving problems

- apply Ohm’s law to a mixed conductor section of a circuit;

Аssessment criterion

-       Know Ohm's law and applies it when solving problems

-       applies Ohm's law to a section of a circuit in a mixed connection

Language objectives

Learners can: interpret sketch graphs to explain the electrical behaviour of different components (speaking skills)

Subject-specific vocabulary & terminology:

I-V characteristics

metallic conductor at constant temperature

semiconductor diode

filament lamp

Ohm’s law

ohmic conductor

non-ohmic conductor

resistance

Useful sets of phrases for dialogue and writing:

For a metallic conductor at constant temperature, I is directly proportional to V (Ohm’s Law).

The filament lamp and semiconductor diode show non-ohmic behaviour.

The semiconductor diode conducts with very low resistance in one direction and has almost infinite resistance in the other.

As temperature… the resistance

Values instilled at the

lesson

Responsibility, life-long learning, honesty  

Cross-curricular links

Engineering, English, ICT and Mathematics

ICT skills

Using a Smart board, calculators and laptops.

Previous learning

Topics in this unit have already been met in Grade 8, so there should be a foundation of knowledge and understanding on which to build. However, learners will benefit from more opportunities to build circuits and to explore electrical characteristics. This should provide opportunities to practice data collection and recording and graph plotting skills which are relevant to all parts of this course and in other sciences. The work with potential dividers opens up ideas for the design of sensing and decision-making circuits.

Course of the lesson

Planned stages of the lesson

Planned activities at the lesson

Resources

Beginning

At the beginning of the lesson it is important to focus on:

Grabbing learners’ attention

Determining the lesson objectives/LO together with students

Determining the "zone of proximal development" of students, expectations by the end of the lesson

Middle

Introduction:

Ohms law, sometimes more correctly called Ohm's Law, named after Mr. Georg Ohm, mathematician and physicist born 1789 and died 1854 in Bavaria, defines the relationship between power, voltage, current and resistance. These are the very basic electrical units we work with. The principles apply to direct current or alternating current. Ohms Law is the foundation of electronics and electricity. These formulae are very easy to learn and are used extensively by electricians. Without a thorough understanding of "ohms law" an electrician would either design or troubleshoot even the simplest of electronic or electrical circuits. Ohm established in the late 1820's that if a voltage was applied to a resistance then "current would flow and then power would be consumed".

Presentation of new material.

1. First, we will test by experience and establish the relationship between current strength and resistance at constant voltage, this relationship

The second stage will consist in establishing the dependence of the current on the voltage, we will write the results in a table, we will make a conclusion about the nature of this dependence.

At the third stage, we will jointly draw a general conclusion about how the current strength simultaneously depends on voltage and resistance, i.e. solve the main problem of the lesson.

The dependence of current strength on voltage and resistance, with which we will meet today, was first established by the German scientist Georg Om in 1827, and therefore is called Ohm's law for a circuit section.

lesson topic: “Ohm’s law for the chain section”.

Set the relationship between I, U, and R.

1.From the beginning we must find out the dependence of the current strength on the resistance (we will not change the voltage)

• assemble the circuit according to the scheme;

data of experience to bring in the table;

• Mark the values of I and R on the coordinate axes; The graphical dependence of the current on the voltage is called the current-voltage characteristic (volt-ampere characteristic) of the conductor.

• make a conclusion

2. And now we have to figure out the dependence of the current on the voltage with constant resistance of the circuit.

• Assemble the circuit according to the scheme;

• Say what the chain consists of;

• Data of experience to bring in the table;

• Mark the values of I and U on the coordinate axes;

• Make a conclusion:

Appendix 1

Appendix 2

Appendix 3

End

Verification of material learning

           Conversation on:

        What values are included in Ohm’s law?

          - How does the current depend on the voltage at the ends of the plot?

         - How does the current strength depend on the resistance of the plot?

         - formulate Ohm's law?

            (students answer questions)

Task: based on the knowledge of the structure of metals, justify the nature of the dependence of current strength on voltage and resistance.

At the end of the lesson, learners reflect on their learning:

-       What has been learned

-       What remained unclear

-       What is necessary to work on

Where possible the learners could evaluate their own work as well as the work of their classmates using certain criteria.

Differentiation – how do you plan to give more support? How do you plan to challenge the more able learners?

Assessment – how are you planning to check students’ learning?

Health and safety regulations

Differentiation can be by task, by outcome, by individual support, by selection of teaching materials and resources taking into account individual abilities of learners (Theory of Multiple Intelligences by Gardner).

Differentiation can be used at any stage of the lesson keeping time management in mind.

Use this section to record the methods you will use to assess what students have learned during the lesson.

Health promoting techniques

Breaks and physical activities used.

Points from Safety rules used at this lesson.

Reflection

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 timings?

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. 

Summary evaluation

What two things went really well (consider both teaching and learning)?

1:

2:

What two things would have improved the lesson (consider both teaching and learning)?

1:

2:

What have I learned from this lesson about the class or achievements/difficulties of individuals that will inform my next lesson?