MH SET 2021 Paper 2 Electronics Science Question Paper (26-Sep-2021)

Question 1

A Si n-p-n bipolar transistor has the following parameters collector current $I_c = 6$ mA, common emitter current gain factor $h_{FE} = 120$, operational temperature $T = 300^\circ K$. Determine the mutual conductance of small signal transistor.

Accepted Answer

0.23 mho

Answer

0.02 mho

Answer

2.3 mho

Answer

4.33 mho

Question 2

When an electron is thermally excited to conduction band in semiconductor, an electron is surrounded by :

Accepted Answer

a large number of unoccupied energy states

Answer

a very less number of occupied energy state

Answer

a very less number of unoccupied energy state

Answer

a large number of occupied energy states

Question 3

n-channel MOSFET is preferred than p-channel MOSFET because :

Accepted Answer

the electron mobility in Si is larger than the mobility of holes

Answer

input impedance of n-channel is higher than the input impedance of p-channel MOSFET

Answer

input impedance of p-channel is higher than the input impedance of n-channel MOSFET

Answer

the electron mobility in Si is smaller than the mobility of holes

Question 4

For a p-type material the Fermi level :

Accepted Answer

lies near the valence band

Answer

lies at the middle of Fermi region

Answer

lies near the conduction band

Answer

lies in the conduction band

Question 5

Mobility of electrons for Silicon (intrinsic) at 300 K is :

Accepted Answer

$1350\ \mathrm{cm^2/s}$

Answer

$3900\ \mathrm{cm^2/s}$

Answer

$5000\ \mathrm{cm^2/s}$

Answer

$8500\ \mathrm{cm^2/s}$

MH SET 2021 Paper 2 Electronics Science Question Paper (26-Sep-2021)

MAHA TAIT Mock Test Series (New)

MH-SET (Assistant Professor) Mock Tests Series (New)