CS/B.TECH(ECE-N)/SEM-3/EC-302/2012-13
2012
SOLID STATE DEVICES
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words as far as practicable
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following :
10X1 = 10
i) A p-type semiconductor contains holes and
a) Positive ions b) Negative ions
c) Pentavalent atoms d) Donor atoms.
ii) Diffussion of free electrons across the junction of an
unbiased diode produces
a) Forward bias b) Reverse bias
c) Breakdown d) the Depletion Layer.
iii) When a pentavalent impurity is added a semiconductor becomes
a) positively charged b) negatively charged
c) neutral d) none of these.