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

what is photo diode? Mention its one use.

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It is a special purpose p-n junction diode whose current strength varies with the intensity of incident light
1. It can be used as a photo - detector .
2. It is used in light - meters and camera .
3 . It is used a accurate measurement of light intensity .
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SUNSTAR PUBLICATION-ANNUAL EXAM QUESTION PAPER MARCH -2015-PART-A
  1. Mention two applications of infrared radiation.

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

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

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  4. Draw the block diagram of generalised communication system.

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

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  6. How is galvanometer converted into an ammeter?

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  7. Distinguish between diamagnetic and paramagnetic substances.

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

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

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

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

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

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

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

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

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  16. Derive the expression for refractive index of the material of the pris...

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  17. Write Einsteins's equation of photoelectric effect. Give Einstens expl...

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  18. What is amplification? With a circuit diagram, explain the working of ...

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  19. two point charges + 1n C and -4 nc are 1m apart in air . Find the posi...

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  20. Two cells of emf 2V and 4V and internal resistance 1Omega and 2Omega r...

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