TNSB - 7 - Science :: Electricity

Go To: TNSB-Sci-Grade 7

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Course content
Textbook
Teaching learning resources

Course Content / Subtopic list:

Electric current and uses
Measurement of electric current
Unit of potential difference
Electrical conductivity and Resistivity
Sources of Electric current -Electro chemical cells or electric cells
Types of cell – primary cell and secondary cell
Batteries, Invention of the Battery
Electric circuit and types
Conductors And Insulators
Factors affecting Heating Effect of current
Magnetic Effect of electricity
Application of magnetic effect of electric current - Electromagnet
Chemical Effects of Electricity

Expected Learning Outcome:

SWBAT-

Explain the symbols of the electric component
Describe the magnetic effect of electric current
Distinguish between heating effect and magnetic effect

English Medium

English medium textbook
English medium textbook
English medium textbook

Tamil Medium

Tamil medium textbook
Tamil medium textbook
Tamil medium textbook

Lesson Plan

[Contributor - Gayathri Arun Kumar]

Dear Volunteer,

Please find below the detailed lesson plan and PPT for this chapter in the language mentioned against the respective link. While the lesson plan will give an overall flow of the lesson, the PPT will include lesson flow as well as the presentations for the class.

https://drive.google.com/open?id=1D2QAqh_tbMbWGNER-feHFqksPZiZB-ry (Lesson Plan - English)

https://drive.google.com/open?id=1zH8jx1uhw2pHLIDLiiXGHN_lUdCTCdBp (PPT - Tamil)

You may use the content as it is or download and modify them to suit the students requirements.

If you feel any major modifications or additions are carried out by you in the form of adding any new activity, presentations, videos etc. we request you to send the modified version to submitcontent@evidyloka.org for enabling upload the modified version.

The worksheets of the lesson can be accessed from the worksheet tab.

Kindly rate the lesson plan and share your suggestions and comments on the lesson plan in the comments box below. Your valuble suggestions and comments will help us to improve the content.

Videos

[Contributor - Kripa S]

https://www.youtube.com/watch?v=QZPURSF5iH4 (electric circuit)

[Contributor - Gayathri Arun Kumar]

Lesson Plan version 1.1 videos

https://www.youtube.com/watch?v=QzHdeA-2ARI (Electricity)

https://www.youtube.com/watch?v=czeMTuxprpo (Function of a generator)

https://www.youtube.com/watch?v=e4qEkqWVDfE (electric cell and its types)

https://www.youtube.com/watch?v=jrdK4c6XlsE (Basic electrical symbols)

https://www.youtube.com/watch?v=mro7lJfSGc8 (Conductors and insulators)

https://www.youtube.com/watch?v=05aDyPtca_g (Electric fuse)

https://www.youtube.com/watch?v=YJl13XKmL-0 (magnetic effect of electric current)

https://www.youtube.com/watch?v=6hQ78YzQvcU (electro magnet)

https://www.youtube.com/watch?v=2Y80QG-F7Fs (Electric door bell)

Images

[Contributor - Kripa S]

http://images.tutorvista.com/content/thermal-chemical-currents/copper-sulphate-electrolysis.jpeg (effect of electricity)

http://mste.illinois.edu/nwaight/ohm/images/animated%20gifs/circuit.gif (electric current)

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTHPn0LtRIHW3Ufozf_4bjMv4leSSMrU-Ix_6caXdFT96Y67Sjr (electricity)

http://www.ekshiksha.org.in/images%20of%20Electricity_and_Circuits_VI/6.png (electric cell)

Activities

[Contributor - Kripa S]

1. If there were no electric supply for a month, how would that affect your day to day activities and others in your family? Present it in the form of a story or a play.

2. https://www.youtube.com/watch?v=Zy_Jvmj6w2U (salt water battery)

[Contributor - Gayathri Arun Kumar]

Lesson Plan version 1.1 activities

1. https://www.youtube.com/watch?v=a1njBrbZs3M (Tamil- Activity)

2. Press the lemon on the table to make it soft. Twist one end of a plastic coated wire around the copper wire and push the copper wire into the lemon. Connect the other end of the wire to one terminal of the galvanometer. Wind one end of the other wire around an iron nail and push the nail into the lemon at a distance of 3 cm from the copper wire. Connect the free end to the other terminal of the galvanometer.

3. attach a piece of wire to each board pin. I push one pin into the flat side of the wood. I push the second pin through the end loop of the paper clip and into the board. The drawing pins are about 1cm apart. To test the switch, I connect the free end of one of the wires to the positive terminal of the battery. I use the free wire to connect the negative terminal of the battery to the bulb holder. I connect the free wire on the switch to the free screw on the bulb holder.

4. strip the insulation at both ends of the three wires so that about 1cm of the metal portion is exposed. I connect the negative end of the cell to one end of the key with a wire and the other end of the key to the threaded portion of the bulb with another wire. I secure both ends with insulation tape. I connect the positive end of the cell to the bottom portion of the bulb with the third wire. I close the key and allow the current to flow for some time and then touch the bulb. I allow the current to flow for a longer time. Then I connect two cells in the circuit so that more current flows through the bulb

5. Take an empty matchbox. Place a small compass needle inside the matchbox tray. Wind an electric wire a few times around the tray. Now connect the free ends of the wire to a battery through a switch. Keep the switch in the off position. Bring a bar magnet near the compass needle. Allow the current to flow by keeping the switch in the ON position. Move the switch to the OFF position. Does the compass needle come back to its initial position?

6. wind a copper wire around an iron nail. I connect one end of the wire to one end of the battery and the other end to the other terminal of the battery through a key. I bring some pins near the nail after closing the key. I now open the key and again bring the pins near the nail. I repeat the activity by increasing the number of turns. I repeat the activity by increasing the amount of current passed (by using three or four cells).

Additional Aids

[Contributor - Ramkee]

https://drive.google.com/open?id=0BzNF2YyqQxJ-d0VtSkNwSVpNd2M

[Contributor - Gayathri Arun Kumar]

Lesson Plan version 1.1 PPT

https://drive.google.com/open?id=1zH8jx1uhw2pHLIDLiiXGHN_lUdCTCdBp

Transliteration

[Contributor - Preethi Saravanakumar]

Term	Transliterated Term	Translated Term
Electricity	எலக்ட்ரிசிட்டி	மின்னியல்
Generator	ஜெனெரேட்டர்	மின் இயற்றி
Electric Cell	எலக்ட்ரிக் செல்	மின்கலம்
Primary Cells	பிரைமரி செல்ஸ்	முதன்மை மின்கலம்
Secondary Cells	செகண்டரி செல்ஸ்	துணை மின்கலம்
Electric Circuit	எலக்ட்ரிக் சர்கியூட்	மின் சுற்று
Switch	சுவிட்ச்	தொடு சாவி
Bulb	பல்ப்	மின்விளக்கு
Connecting Wire	கன்னெக்ட்டிங் வயர்	இணைப்பு கம்பி
Conductors	கண்டக்டர்ஸ்	கடத்திகள்
Insulators	இன்சுலேட்டர்ஸ்	மின்காப்புப் பொருள்கள்
Electric Fuse	எலக்ட்ரிக் பியூஸ்	மின்உருகு இழை
Magnetic Compass	மேக்னெட்டிக் காம்பஸ்	காந்த ஊசிப்பெட்டி
Electromagnet	எலெக்ட்ரோமேக்னெட்	மின்காந்தம்
Electric Bell	எலக்ட்ரிக் பெல்	மின்சார மணி