S. Mark the correct answer for the following questions. 10 points i) The increme

Question

S. Mark the correct answer for the following questions. 10 points i) The incremental resistance of a forward biased diode is a) directly proportional to current b) inversely proportional to current c) independent of current ii) The reverse bias capacitance of a step junction diode is a) directly proportional to reverse voltage b) inversely proportional to the square root of the reverse voltage c) directly proportional to reverse current ii) Diffusion capacitance of a diode is a) directly proportional to built-in voltage b) inversely proportional to the built-in voltage c) directly proportional to the forward current iv) A Zener diode is always operated such that it is a) in forward bias b) in reverse bias below knee current c) in reverse bias carrying max current under no load v) The stored charge in the base of a transistor depends on a) collector current only b) base transit time only c) depends on both a) and b)

Explanation / Answer

1) B , the incremental resistance is inversely proportional to the change in current

2)B, when reversed biased voltage increased, large number of holes from p side and electrons from n side move away from the depltion region. so the width increase, the junction with small depletion region and large p and type material will store more charge that that of wider depletion region

3)B,C = dQ/dV

4)B , It is mainly designed to operate in reverse biased condition below the breakdown current

5)C, Stored charge = t r * Ic

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