Microwave Devices and Circuits MCQs

Question 1

The largest application of microwaves is in

Accepted Answer

communications

Answer

industrial heating

Answer

research

Answer

cooking

Question 2

Microwave links are preferred for TV transmission because

Accepted Answer

they produce less phase distortion

Answer

they are free from impulse noise

Answer

they are cheaper

Answer

they have large bandwidth

Question 3

The parametric amplifier has ____ gain and low noise figure

Accepted Answer

high

Answer

medium

Answer

negligible

Answer

low

Question 4

Which is the cross field device?

Accepted Answer

Reflex klystron

Answer

Magnetron

Answer

Two cavity klystron

Answer

Travelling wave tube

Question 5

Which of the following microwave diodes is suitable for very low power oscillators?

Accepted Answer

TUNNE1

Answer

GUNN

Answer

LSA

Answer

IMPATT

Question 6

Which of the following statement is not valid? A varactor diode may be useful at microwave frequencies

Accepted Answer

as an oscillator

Answer

for electronic tuning

Answer

as a parametric amplifier

Answer

for frequency multiplication

Question 7

The advantage of microwave over lower frequency signals is

Accepted Answer

ability to use high gain

Answer

increased bandwidth

Answer

increased secrecy

Answer

all of the above

Question 8

When the peak power is 10,00,000 watts and the average power is 800 watts then the duty cycle is

Accepted Answer

0.08 per cent

Answer

0.008 per cent

Answer

0.8 per cent

Answer

8 per cent

Question 9

Which of the following method should be used for measurement of high values of VSWR?

Accepted Answer

double minima method

Answer

single minima method

Answer

either of the above

Answer

none of the above