FORMULAE AND NOTES

FORMULAE OF CLASS 11 and 12 (click on the below links)

11-TH STANDARD KEY POINTS, FORMULAE AND CONCEPTS (K.F.C)


STAND ARD - 11 NOTES (click on the below links)

STANDARD - 12 NOTES (click on the below links)

NOTES

 

1. Electric fields and Charges

- Teaching questions

2. Electric potential and Capacitance

- Teaching questions

3. Current Electricity

- Teaching questions

4. Magnetic effect of Current

- Teaching questions

5. Magnetism and Matter

- Teaching questions

6. Electro Magnetic Induction

- Teaching questions

7. Alternating Current

- Teaching questions

8. Electromagnetic Waves

- Teaching questions

9. Ray optics

- Teaching questions

10. Wave optics

- Teaching questions

11. Dual Nature of Radiation and Matter Waves

- Teaching questions

12. Atoms

- Teaching questions

13. Nuclei

- Teaching questions

14. Semiconductor devices

- Teaching questions


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Puzzle Question : A bear fell from a height of 10 meters from ground. It reached ground in √2 seconds. But somehow, it didn’t get hurt. What is the color of the bear? Answer :  In combination, the equatorial bulge and the effects of the surface centrifugal force due to rotation mean that sea-level effective gravity increases from about 9.780 m/s2 at the Equator to about 9.832 m/s2 at the poles, so an object will weigh about 0.5% more at the poles than at the Equator. Taking value of gravity at Polar region as 9.8 =~ 10. Applying N ewtons second equation of motion(s=ut+1/2at^2), times comes to be sqrt(2).Hence bear belongs to polar region, hence it should be white in color.
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