Define: Recombination and carrier generation
[3 marks]Differentiate: Spontaneous and Stimulated emission.
[4 marks]Explain Energy Band Diagrams in solids with the necessary diagram.
[7 marks]State assumption of classical free electron gas theory.
[3 marks]Differentiate: Direct and Indirect bandgap in semiconductors
[4 marks]Explain: Working of the p-n junction diode and state its applications.
[7 marks]Write a short note on DOS ( Density of State)
State: Fermi function
[3 marks]Differentiate: Intrinsic and Extrinsic Semiconductor.
[4 marks]Explain the working of solar cells with the necessary diagram.
[7 marks]Define: Ohmic junction
[3 marks]Explain: Exciton
[4 marks]Write a brief note on Kronig-Penney Model.
[7 marks]Define: Superconductivity and Transition temperature Tc
[3 marks]Write down applications associated with SQUID.
[4 marks]Explain the Meissner effect and prove that superconductors are perfect diamagnetic.
[7 marks]Define: Absorption of Light
[3 marks]Explain: Hot Point probe measurements.
[4 marks]Write a brief note on the density of electrons in the conduction band.
[7 marks]What do you mean by drift and diffusion current?
[3 marks]Differentiate: Type Iand Type II superconductors.
[4 marks]Explain: Four Point Probe technique (for Bulk sample)1
[7 marks]State: Formula for Fermi`s Golden Rules.
[3 marks]Calculate the critical current which can flow through a long thin superconducting wire of diameter 10-3 m. Given Hc=7.9 X10 3 amp/m
[4 marks]Write a brief note on Visible Spectroscopy and state its applications.
[7 marks]