2. Electric Current And Its Effects SUBJECT-SCIENCE Class – 7th

3. Electric components Electrochemical cell (cell) Battery How electric current flows Types of circuit Used keywords: Battery, Electric components,Circuit diagram OVERVIEW

4. What is required for these components to work ? What is required for these components to work ?

5. Electricity

6. Can you tell how will electricity reach to these components?

7. Battery When we use it Cell When we use it

8. Battery or cell are required for it Battery - because its required more electricity Next

9. if we want more amount of electricity then we use Battery

10. When we want less amount of electricity then we use cell, it has two terminal (+ve) and (-ve) terminal. Next

11. An electrochemical cell is a device capable of either deriving electrical energy from chemical reactions its have two terminal (+ve)and (–ve). battery is combination of two or more electrochemical cell in series.combination of two or more electrochemical cell DEFINITION OF ELECTROCHEMICAL CELL AND BATTERY

12. Batteries! Next

13. Electric Current: The flow of electric charges. Lower potential (- ve) Higher Potential (+ ve)

14. Battery (Chemical Cell): A device that converts chemical energy to electricity. A battery provides a potential energy difference (voltage source). https://www.youtube.com/watch?v=pgmoad7h vtc

15. Type of circuit Electric circuit Serial circuit Parallel circuit

16. A Series Circuit is a circuit whose components are connected in a single loop In a Series Circuit, the Current I flowing through each component is the same but Voltage across each component can be different. Serial circuit Next

17. Resisters are connected in separate branches There is more than one path for current Next Parallel Circuit

18. ASSESSMENT QUESTION QUES. See the picture below and give answers. 1.Would any of the bulb glow when the switch is in the ‘OFF’ position ? 2.What will be the order in which the bulbs A,B and C will glow when the switch in moved to the ‘ON’ position ?

20. Reference http://www.youtube.com/watch?v =NVcvD3exIto http://www.youtube.com/watch?v =NVcvD3exIto NCERT Book