Electromagnetics [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 14 - 16 of 96

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Question 14

Electromagnetics
Impedance Matching

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)

TEM mode

(i)

Both electric and magnatic field present in the direction of propagation

(B)

Hybrid mode

(ii)

No magnetic field in the direction of propagation

(C)

TE mode

(iii)

No electric, no magnetic field in the direction of propagation

(D)

TM mode

(iv)

No electric field in the direction of propagation

Choices

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

a.

  • (iii)
  • (i)
  • (iv)
  • (ii)

b.

  • (ii)
  • (iii)
  • (iv)
  • (i)

c.

  • (i)
  • (iii)
  • (iv)
  • (ii)

d.

  • (iv)
  • (ii)
  • (i)
  • (iii)

Question 15

Electromagnetics
Impedance Matching

Appeared in Year: 2016 (UGC-NET)

Question

MCQ▾

For transmission lines following statements are given:

(1) There is no cut-off frequency for TEM in coaxial cables.

(2) Coaxial cables are useful up to 100 MHz only.

(3) Waveguides do not support TEM waves.

(4) All the frequencies above cut-off flow through waveguides.

Out of the above statements following is true:

Choices

Choice (4)Response

a.

(2) , (3) and (4)

b.

(1) and (2)

c.

(1) , (3) and (4)

d.

(1) , (2) and (3)

Question 16

Electromagnetics
Gain and Directivity

Appeared in Year: 2016 (UGC-NET)

Question

MCQ▾

For a matched junction, scattering parameters are given values, which one of the following is true?

Choices

Choice (4)Response

a.

b.

c.

d.

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