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Give any two practical limitations of Oh...

Give any two practical limitations of Ohm's law.

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SUNSTAR PUBLICATION-ANNUAL EXAM QUESTION PAPER MARCH -2015-PART-A
  1. What is attenuation in communication system ?

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

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  3. Give any two practical limitations of Ohm's law.

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  4. List the properties of magnetic field lines.

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  5. Current in a coil falls from 2.5a to 0.0a in 0.1 second inducing an em...

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  6. Mention two applications of infrared radiation.

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  7. Draw the ray diagram of image formation in case of compound microscope

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  8. what is photo diode? Mention its one use.

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  9. Draw the block diagram of generalised communication system.

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  10. Derive an expression for capacitance of a paralle plate capacitor

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  11. How is galvanometer converted into an ammeter?

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  12. Distinguish between diamagnetic and paramagnetic substances.

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  13. Derive the expression for emf induced in a straight conductor moving p...

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  14. Show that voltage in an inductor leads the current by pi//2 rad for ...

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  15. what is interference ? Write the condition for path difference in case...

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  16. Derive an expression for the radius of n^(th) Bohr's orbit of hydrogen...

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  17. Distinguish between conducor and semiconductor on the basis of theory ...

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  18. Obtain an expression for the electric field intenstiy at a point on th...

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  19. Obtain an expression for equivalent resistance of two resistors connec...

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  20. Derive the expression for magnetic field at a point on the axis of a c...

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