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Define mean life of a radioactive elemen...

Define mean life of a radioactive element.

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OSWAAL PUBLICATION-Sample Paper 4-Exercise
  1. What is the rest mass of photon?

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  2. Write three postulates of Bohr. Mention two limitation of Bohr model.

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  3. Define mean life of a radioactive element.

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  4. write the symbol of NAND gate .

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  5. What is attenuation in communication system ?

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  6. Write Coulomb's law in vector form and explain the terms.

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  7. Mention two limitations of Ohm's law.

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  8. Write any two differences between diamagnetic and paramaganetic substa...

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  9. Current in a coil falls from 5 A to 0 A in 0.1 s, calculate the induce...

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  10. Give two uses of UV rays.

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  11. Draw the ray diagram for the formation of image in case of a concave m...

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  12. Distinguish between extrinsic and intrinsic semiconductors.

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  13. Write the block diagram of a transmitter.

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  14. Derive the relation between electric field and electric potential.

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  15. Arrive at the expression for velocity selector using Lorentz force.

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  16. Mention any three salient features of Hysteresis loop.

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  17. Derive the expression for motional emf induced in a conductor moving i...

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  18. Mention one power loss in transformer.

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  19. Using Huygen's wave theory of light, show that the angle of incidence ...

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  20. Write Einstein's photoelectric equation. State clearly how this equati...

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