Semiconductor Devices Test

Result

Semiconductor Devices Test - 18

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Weekly Quiz Competition

Question 1
4 / -1

In the characteristic curve of diode valve, the region where the value of plate current depends only on plate voltage is said to be

A
space charge limited region

B
temperature limited region

C
saturation current region

D
all of the above
Question 2
4 / -1

The following graph shows, the characteristic curve of a thermionic diode, then the space charge limited current portion will be

A
OP

B
OQ

C
PQ

D
QT
Question 3
4 / -1

Child’s law is

A

B

C

D
Question 4
4 / -1

The voltage gain of triode amplifier is 30 and input voltage is V_i = sin 100πt, then output voltage will be

A
30 sin 100πt

B
sin 100πt

C
– 30 sin 100πt

D
– sin 100πt

Solution
Question 5
4 / -1

If lattice parameter for a crystalline structure is 3.6 Å, then atomic radius in fcc crystal in Å is

A
7.20

B
1.80

C
1.27

D
2.90

Solution
Question 6
4 / -1

In a p-type semiconductor the acceptor level is situated 60 meV above the valence band. The maximum wavelength of light required to produce a hole will be

A
0.207 × 10^–5 m

B
2.07 × 10^–5 m

C
20.7 × 10^–5 m

D
2075 × 10^–5 m

Solution
Question 7
4 / -1

In insulators

A
the valence band is partially filled with electrons

B
the conduction band is partially filled with electrons

C
the conduction band is filled with electrons and valence band is empty

D
the conduction band is empty and the valence band is filled with electrons
Question 8
4 / -1

If a semiconductor has an intrinsic carrier concentration of 1.41 × 10¹⁶ /m³ when doped with 10²¹/m³ phosphorus atoms, then the concentration of holes/m³ at room temperature will be

A
2 × 10²¹

B
2 × 10¹¹

C
1.41 × 10¹⁰

D
1.41 × 10¹⁶
Question 9
4 / -1

Ripple factor of full wave rectifier is

A
0.48

B
4.7

C
12.1

D
1.21
Question 10
4 / -1

In which of the following fig., the junction diode is reverse biased?

A

B

C

D