Electronics and Communication Engineering - Exam Questions Papers

16. 

Method of images is applicable to which fields?

A. Electrostatic fields only
B. Electrodynamic fields only
C. Neither electrostatic fields nor electro-dynamic fields
D. Both electrostatic fields and electro-dynamic fields

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

17. 

Identification of highest priority interrupt can be achieved in a minimum time by which of the following schemes?

A. Hardwired polling
B. Priority encode circuit
C. Software polling
D. Subdivision of interrupt register into a number of sub registers which are checked parallely

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

18. 

A super heterodyne receiver has an input circuit tuned to a 570 KHz signal. If the intermediate frequency of the amplifier is tuned to 455 KHz. The quality factor Q for a Image Rejection ratio of 125?

A. 100
B. 56.81
C. 42.74
D. 87

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

19. 

The antenna most commonly used for TV broadcasting in the UHF band is

A. turnstile antenna
B. dipole antenna
C. yagi antenna
D. rhombic antenna

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

20. 

Which of the following is a microwave power amplifier?

A. Gunn diode
B. Reflex klystron
C. Magnetron
D. Travelling wave tube

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.