FUNDAMENTAL OF ELECTRONICS ENGINEERING
SEM-I, 2011
UTU PREVIOUS YEAR QUESTION PAPERS
Time: 3
hours
Total
marks: 100
Attempt any four parts:
- What happens to the conductivity of semiconductors with the rise in temperature? Compare with the conductivity of metals.
- What is meant by Fermi level in semiconductor?
- At room temperature, the reverse saturation current is 0.3µA when a reverse bias is applied to a Ge diode. Find the value of current flowing in diode when 0.15V forward bias is applied.
- Define conductivity. Derive the expression of conductivity in intrinsic and extrinsic semiconductors.
- Explain the formation of depletion layer in a p-n junction diode.
- Explain the transition capacitance and diffusion capacitance of a p-n junction diode.
