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[b] A heavily doped P side with acceptor concentration

1018

cm-3

is connected to n side with donor

concentration of 10

16

cm

-3

. Calculate the built inpotential. [4]

Q. [9] Write short notes on any TWO: [5+5]

(a) Thermocouple.

(b) Superconductivity.

(c) Ferro-electricity and Piezoelectricity.

(d) Compensation doping.

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potential depletion width at room temperature .

[intrinsic concentration = 1.45 1010

cm-3

]

Q. [9] Write short notes on: [42.5=10][a] Tunnelling

[b] Extrinsic semiconductors.

[c] Ferromagnetic Materials.

[d] Fermi Dirac Statistics.

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