Antennas And Wave Propagation : Electrical and Electronics MCQ Practice Questions & Answers (Hindi)

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1.

.............. potential is used to find the field components of current element

A

Scalar Potential, V

B

Vector Potential, A

C

Both a and b

D

None

Electrical And ElectronicsEasyAntennas And Wave Propagation

2.

Alternating current element is given by

A

I dl

B

I dl cos?t

C

I dl sin?t

D

I

Electrical And ElectronicsEasyAntennas And Wave Propagation

3.

Which condition makes coupled equations into uncoupled equations

A

Retarded

B

Helmholtz

C

Lorentz gauge

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

4.

R/v is called ..............

A

Radiation to voltage ratio

B

resistance to velocity ratio

C

Propagation delay

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

5.

The source of vector potential is

A

Charge density

B

Current density

C

Both a and b

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

6.

The source of scalar potential is

A

Charge density

B

Current density

C

Both a and b

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

7.

Antenna aperture is same as ..............

A

Length

B

width

C

Area

D

volume

Electrical And ElectronicsEasyAntennas And Wave Propagation

8.

Radiation resistance of antenna is ..............

A

Physical resistance

B

Virtual Resistance

C

Both a and b

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

9.

Antenna temperature considers .............. parameter into account

A

Directivity

B

gain

C

Beam area

D

beam efficiency

Electrical And ElectronicsEasyAntennas And Wave Propagation

10.

.............. Theorem can be applied to both circuit and field theories

A

Equality of patterns

B

Equality of impedance

C

Equality of effective lengths

D

Reciprocity theorem

Electrical And ElectronicsEasyAntennas And Wave Propagation

11.

Effective aperture is always .............. than Physical aperture.

A

Higher

B

lower

C

Both a and b

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

12.

Directivity and Resolution are ..............

A

Different

B

same

C

Both a and b

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

13.

Gain is always .............. than directivity

A

Greater

B

lesser

C

Equal to

D

none

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14.

Directivity is inversely proportional to………

A

HPBW

B

FNBW

C

Beam area

D

Beam width

Electrical And ElectronicsEasyAntennas And Wave Propagation

15.

The minimum value of the directivity of an antenna is……….

A

Unity

B

zero

C

Infinite

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

16.

.............. is independent of distance

A

Poynting vector

B

radiation intensity

C

Both a and b

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

17.

One steradian is equal to .............. square degrees

A

360

B

180

C

3283

D

41253

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18.

.............. is also called as 3-dB bandwidth

A

FNBW

B

HPBW

C

Both a and b

D

none

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19.

Radiation pattern is .............. dimensional quantity

A

Two

B

three

C

Single

D

none

Electrical And ElectronicsEasyAntennas And Wave Propagation

20.

Which of the following is true

A

Time changing current radiates

B

accelerated charges radiates

C

Both a and b

D

none

Antennas And Wave Propagation in Electrical and Electronics : Practice MCQ Questions & Answers with Explanations