Electronics and Communication Engineering - Exam Questions Papers

6. 

Which of the following can be used as a tachogenerator in control systems?

A. Microsyn
B. DC servomotor
C. AC servomotor
D. Magnetic amplifier

Answer: Option C

Explanation:

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7. 

The dominant mode in a rectangular wave-guide is

A. TE01
B. TM01
C. TE10
D. TM11

Answer: Option C

Explanation:

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8. 

Given A = the state transition matrix eAT is given by

A.
B.
C.
D.

Answer: Option B

Explanation:

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9. 

Six sets of electromagnetic waves are given below :
30 - 300 KHz
10 - 30 KHz
3 - 30 MHz
300 - 3000 KHz
30 - 300 MHz
> 300 MHz
There are designated in the following order

A. VLF, LF, MF, HF, VHF, UHF
B. LF, VLF, MF, HF, VHF, VHF
C. LF, VLF, HF, MF, VHF, UHF
D. VHF, VLF, HF, MF, LF, UHF

Answer: Option C

Explanation:

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10. 

Which among the following waveforms can be reconstructed from its samples without distortion?

A. 1 and 2
B. 2 and 3
C. 1 and 3
D. Only 2

Answer: Option A

Explanation:

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