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 |
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 |
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) |
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. |
Question 5
Question MCQ▾
The guided wavelength of rectangular resonator is given by ________.
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
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 |