Electronic Devices [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 10 - 15 of 107

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Question 10

Question MCQ▾

Energy bands in solids are a consequence of

Choices

Choice (4)Response

a.

Heisenberg՚s uncertainty principle

b.

Bohr՚s theory

c.

Pauli՚s exclusion principle

d.

Ohm՚s Law

Edit

Question 11

Question MCQ▾

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

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 12

Question MCQ▾

Let Nh and Ne be the number of holes and conduction electrons respectively in a semiconductor. Then

Choices

Choice (4)Response

a.

Ne > Nh in an intrinsic semiconductor

b.

Nh = Ne in an intrinsic semiconductor

c.

Nh = Ne in an extrinsic semiconductor

d.

Nh > Ne in an intrinsic semiconductor

Edit

Question 13

Question MCQ▾

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

Choices

Choice (4)Response

a.

Ne decreases and Vd increases

b.

Ne and Vd decreases

c.

Ne and Vd increases

d.

Ne increases and Vd decreases

Edit

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:

List of Data Obtaining from Liner Portion of Curve of Static Characteristic Curve of a Triode
Grid voltage Vg (Volt)-2.0-3.5-2.0
Plate voltage Vp (Volt)180180120
Plate current IP (mA)15710

Question 14 (1 of 3 Based on Passage)

Question MCQ▾

Calculate the plate resistance rp of the triode valve?

Choices

Choice (4)Response

a.

1.2 × 104 ohm

b.

1.3 × 104 ohm

c.

0.12 × 104 ohm

d.

1.4 × 104 ohm

Edit

Question 15 (2 of 3 Based on Passage)

Question MCQ▾

Calculate the mutual conductance (gm) of the triode valve?

Choices

Choice (4)Response

a.

53.3 × 10-3 ohm-1

b.

4.32 × 10-3 ohm-1

c.

5.33 × 10-3 ohm-1

d.

5.00 × 10-3 ohm-1

Edit