CS/B.Tech (OLD)/SEM-2/EC-201/2013
2013
BASIC ELECTRONICS ENGINEERING
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 the following : 10 × 1 = 10
i) The unit of mobility of charge carriers in SI unit is
a) Ωm b) m2V-1s-1
c) m2Vs-1 d) m2V-1s-2
ii) Emission co-efficient for Si is
a) 1 b) 3
c) 2 d) 4.
iii) If β = 200 then α will be
a) 0·99 b) 0·98
c) 0·95 d) 0·96.
iv) A differential amplifier has a differential gain of 20,000.
CMRR = 80 dB. The common mode gain is given by
a) 2 b) 1
c) 0·5 d) 0.
v) When both junctions are forward biased the transistor
region operates in
a) active region b) cut-off region
c) saturation region d) inverted region.
vi) The input offset current is equal to the
a) difference between two base currents
b) average of two base currents