GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 615 - 618 of 1076

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Passage

Comprehension:

Read the passage and answer the following five questions:

P-i-n photodiode contains a layer of intrinsic semi-conductor material sandwiched between p-and-n regions. The depletion layer is wholly contained within the i region. Thickness of the intrinsic region can be adjusted to produce device with optimum sensitivity and frequency response. P-i-n photodiode is most common type of depletion layer photodiode.

The other classes of photodiodes, avalanche photodiodes, are reverse-biased p-n junction diodes that are operated at voltages above the breakdown voltage. Current multiplication of electron-hole pairs generated by the incident electromagnetic radiation occurs due to avalanche process. The photo multiplication factor is defined as ratio of the multiplied photocurrent to the photocurrent at voltage below breakdown where no avalanche multiplication takes place.

Question 615 (3 of 4 Based on Passage)

Appeared in Year: 2013 (UGC-NET)

Question

MCQ▾

Semiconductors are sensitive to (September)

Choices

Choice (4)Response

a.

Magnetic field

b.

Heat

c.

Light energy

d.

All a., b. and c. are correct

Question 616 (4 of 4 Based on Passage)

Appeared in Year: 2013 (UGC-NET)

Question

MCQ▾

Which of the following elements is a semiconductor? (September)

Choices

Choice (4)Response

a.

Carbon

b.

Phosphorous

c.

Germanium

d.

Copper

Question 617

Multi-Stage, Differential, Feedback, Power and Operational

Appeared in Year: 2013 (UGC-NET)

Question

Match List-Ⅰ List-Ⅱ▾

Match the following lists: (September)

List-Ⅰ (Column I)List-Ⅱ (Column II)
(A)

Current shunt feedback connection

(i)

Increases the output impedance

(B)

Voltage series feedback connection

(ii)

Decreases the output impedance

(C)

Current series feedback connection

(iii)

Increases input impedance

(D)

Voltage shunt feedback connection

(iv)

Decreases the input impedance

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (ii)
  • (iii)
  • (i)
  • (iv)

b.

  • (iv)
  • (i)
  • (ii)
  • (iii)

c.

  • (ii)
  • (iv)
  • (iii)
  • (i)

d.

  • (i)
  • (iv)
  • (ii)
  • (iii)

Question 618

Appeared in Year: 2014 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

MOV A, 08 H it means the contents of memory address 08 H are moved to be contents of A. (June)

Reason(Ꭱ)

MV I A, 82 H It means that the contents of memory address 82 H are moved to be contents of A immediately.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is false but Ꭱ is true

d.

Ꭺ is true but Ꭱ is false

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