Electronic Devices (NEET Physics): Questions 9 - 14 of 65

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Question number: 9

» Electronic Devices » Semiconductors

MCQ▾

Question

The valence band and conduction band of a solid overlap at low temperature, the solid may be

Choices

Choice (4) Response
a.

Semiconductor

b.

Conductors

c.

Insulator

d. All of the above

Question number: 10

» Electronic Devices » Semiconductors

MCQ▾

Question

Energy bands in solids are a consequence of

Choices

Choice (4) Response
a.

Heisenberg’s uncertainty principle

b.

Ohm’s Law

c.

Pauli’s exclusion principle

d.

Bohr’s theory

Question number: 11

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

The approximate ratio of resistances in the forward and reverse bias of the PN-junction diode is

Choices

Choice (4) Response
a.

102:1

b.

102:1

c.

1:104

d.

1:104

Question number: 12

» Electronic Devices » Semiconductors

MCQ▾

Question

Let N h and N e be the number of holes and conduction electrons respectively in a semiconductor. Then

Choices

Choice (4) Response
a.

N e > N h in an intrinsic semiconductor

b.

N h= N e in an extrinsic semiconductor

c.

N h= N e in an intrinsic semiconductor

d.

N h > N e in an intrinsic semiconductor

Question number: 13

» Electronic Devices » Semiconductors

MCQ▾

Question

If N e and Vd be the number of electrons and drift velocity in a semiconductor. When the temperature is increased,

Choices

Choice (4) Response
a.

N e decreases and V d increases

b.

N e and V d increases

c.

N e increases and V d decreases

d.

N e and V d decreases

Passage

A student performs an experiment for drawing the static characteristic curve of a triode valve in the laboratory. The following data were obtained from the linear portion of the curves:

Data obtained from the linear portion of curve

List of data obtaining from liner portion of curve of static characteristic curve of a triode

Grid voltage V g (Volt)

-2.0

-3.5

-2.0

Plate voltage V p (Volt)

180

180

120

Plate current I P (mA)

15

7

10

Question number: 14 (1 of 3 Based on Passage) Show Passage

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

Calculate the plate resistance r p of the triode valve?

Choices

Choice (4) Response
a.

0.12 × 10 4 ohm

b.

1.2 × 10 4 ohm

c.

1.3 × 10 4 ohm

d.

1.4 × 10 4 ohm

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