Electro Magnetics [IES-ESE (Engineering Services) Electronics]: Questions 1 - 6 of 357

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Question 1

Appeared in Year: 2017

Question MCQ▾

Patch is a: (November paper 2)

Choices

Choice (4)Response

a.

Low gain wide band antenna

b.

High gain wide band antenna

c.

High gain narrow band antenna

d.

Low gain narrow band antenna

Edit

Question 2

Appeared in Year: 2017

Question MCQ▾

Helical antennas are often used for satellite tracking in VHF range because of: (November paper 2)

Choices

Choice (4)Response

a.

Ionospheric refraction

b.

Super - refraction

c.

Troposcatter

d.

Faraday effect

Edit

Question 3

Appeared in Year: 2018

Question MCQ▾

Magnetron is a:

1) O-type tube

2) A low power device

3) A high power device

4) An oscillator

Out of the above, following correct option is: (July)

Choices

Choice (4)Response

a.

1) , 3) and 4)

b.

1) and 2)

c.

3) and 4)

d.

2) and 4)

Edit

Question 4

Appeared in Year: 2018

Question MCQ▾

The cut-off frequency of TEM wave is: (July)

Choices

Choice (4)Response

a.

Zero.

b.

GHz.

c.

d.

Moderate.

Edit

Question 5

Question MCQ▾

The guided wavelength of rectangular resonator is given by ________.

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 6

Appeared in Year: 2018

Question MCQ▾

The loading is sometimes used with an antenna in order to increase the: (July)

Choices

Choice (4)Response

a.

Bandwidth

b.

Effective height

c.

Input capacitance

d.

Beam width

Edit