GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 395 - 398 of 1076

Access detailed explanations (illustrated with images and videos) to 1076 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 450.00 -OR-

How to register? Already Subscribed?

Question 395

Appeared in Year: 2018 (UGC-NET)

Question

Match List-Ⅰ List-Ⅱ▾

Match the two lists and choose the correct answer from the code given below: (December)

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

Fermi level in n-type material

(i)

(B)

Concentration of holes in n-type semiconductor

(ii)

(C)

Contact potential

(iii)

(D)

Concentration of electrons in p-type semiconductor

(iv)

Choices

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

a.

  • (i)
  • (iii)
  • (iv)
  • (ii)

b.

  • (iv)
  • (i)
  • (iii)
  • (ii)

c.

  • (ii)
  • (iii)
  • (iv)
  • (i)

d.

  • (iv)
  • (iii)
  • (ii)
  • (i)

Question 396

Amplitude, Phase and Frequency Shift Keying (ASK, PSK, FSK)

Appeared in Year: 2016 (UGC-NET)

Question

MCQ▾

The number of bits per sample in a PCM system is increased from 8 to 16. The bandwidth of the system would increase

Choices

Choice (4)Response

a.

24 times

b.

8 times

c.

times

d.

2 times

Question 397

Amplitude Modulation and Demodulation

Question

MCQ▾

Determine Laplace transform and region of convergence of .

Choices

Choice (4)Response

a.

; ROC

b.

; ROC

c.

; ROC

d.

; ROC

Passage

Comprehension:

Read the passage and answer the following five questions:

A digital filter uses a digital processor to perform numerical calculations on sampled values of the signal. The processor may be a general purpose such as a PC or specialised DSP chip. The analog input signal must first be sampled and digitised using an ADC. The resulting binary numbers, representing successive sampled values of the signal, are transferred to the processor, which carries out numerical calculations on them. These calculations typically involve multiplying the input values by constants and adding the products together. The results of these calculations, which now represent sampled values of the filtered signal, are converted back to the signal using a DAC.

Question 398 (1 of 3 Based on Passage)

Fourier Series and Fourier Transform Representations

Appeared in Year: 2018 (UGC-NET)

Question

MCQ▾

The order of a digital filter is defined as (December)

Choices

Choice (4)Response

a.

The number of previous inputs and outputs used to calculate the current output of the filter

b.

The number of previous outputs used to calculate the current output of the filter

c.

The number of previous inputs used to calculate the current output of the filter

d.

The number of coefficients in the current output of the filter

Developed by: