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Write the formula and definition of dyna...

Write the formula and definition of dynamic resistance and also state their approximate values for forward bias and reverse bias.

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What is forward bias and reverse bias ?

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The resistance of p-n junction is low when forward biased and is high when reverse biased. Explain.

In a p-n junction diode, the current I can be expressed as I= I_(0) "exp" ((eV)/(2k_(B)T)-1) where I_(0) is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_(B) is the Boltzmann constant (8.6 xx 10^(–5) eV//K) and T is the absolute temperature. If for a given diode I_(0) = 5 xx 10^(-12) A and T = 300 K, then (a) What will be the forward current at a forward voltage of 0.6 V? (b) What will be the increase in the current if the voltage across the diode is increased to 0.7 V? (c) What is the dynamic resistance? (d) What will be the current if reverse bias voltage changes from 1 V to 2 V?

In a p-n junction diode, the current I can be expressed as I=I_(0)"exp"((eV)/(2k_(B)T)-1) where I_(0) is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_(B) is the Boltzmann constant (8.6xx10^(-5)eV//K) and T is the absolute temperature. If for a given diode I_(0)=5xx10^(-12) A and T = 300 K, then (a) What will be the forward current at a forward voltage of 0.6 V ? (b) What will be the increase in the current if the voltage across the diode is increased to 0.7 V ? (c ) What is the dynamic resistance? (d) What will be the current if reverse bias voltage changes from 1 V to 2 V ?

The ratio of resistance of forward bias and reverse bias in p-n connection is …….

In which case is the junction diode is not reverse bias-

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KUMAR PRAKASHAN-SEMICONDUCTOR ELECTRONICS : MATERIALS, DEVICES AND SIMPLE CIRCUITS -Section-D : Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exams)
  1. Write the formula and definition of dynamic resistance and also state ...

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  2. At absolute zero temperature Si acts as ……..

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  3. The energy band gap is maximum in …….

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  4. Formation of covalent bonds in compounds exhibits …….nature.

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  5. By increasing the temperature, the specific resistance of a conductor ...

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  6. The difference in the variation of resistance with temperature in a me...

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  7. In the middle of the electron layer of a reverse biased p-n junction, ...

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  8. A piece of copper and another of germanium are cooled from room temper...

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  9. The manifestion of band structure in solids is due to …….

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  10. When p-n junction diode is forward biased ………

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  11. The electrical conductivity of a semiconductor of a semiconductor incr...

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  12. In a full wave rectifier circuit operating from 50 Hz mains frequency...

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  13. Ratio of number density of holes is (7)/(5) and ratio of their current...

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  14. Which of the following is true ?

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  15. A charge of 2 xx 10^(-2) C moves at 30 revolutions per second in a ci...

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  16. A solid which is transparent to visible light an whose conductivity in...

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  17. As shown in the following figure take A and B input waveforms. Sketch...

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  18. A logic circuit is shown in the diagram. Draw the output signal at the...

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  19. Carbon, silicon and germanium have four valence electrons each. At roo...

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  20. Figure shows electric field lines in which an electric dipole P is pla...

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  21. As shown in the following figure, take A and B input waveforms. Sketch...

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