# Terms, Definitions, MCQs and Free Templates

## Which one is correct?

Which one is correct?

## The radiation pattern of loop antenna is

The radiation pattern of loop antenna is

## Directivity of antenna is defined as

Directivity of antenna is defined as

## For an ideal antenna, numerical value of directivity must be

For an ideal antenna, numerical value of directivity must be

## Which of the antenna is best excited by a waveguide?

Which of the antenna is best excited by a waveguide?

## Self impedance is

Self impedance is

## Mutual impedance is not depend upon

Mutual impedance is not depend upon

## In a metal, the drift velocity of electrons in the presence of a electric field E is

In a metal, the drift velocity of electrons in the presence of a electric field E is

## Radiation resistance for wire antenna is

Radiation resistance for wire antenna is

## The gain of an half wavelength antenna is

The gain of an half wavelength antenna is

## Gain of isotropic antenna is

Gain of isotropic antenna is

## 1 dB is equal to __________ nepier

1 dB is equal to __________ nepier

## The refractive index of E layer, if angle of incidence is 30°

The refractive index of E layer, if angle of incidence is 30°

## Bandwidth of an antenna is related with where Q is quality factor

Bandwidth of an antenna is related with where Q is quality factor

## Which of following antenna not produces circular polarisation?

Which of following antenna not produces circular polarisation?

## Which of following antenna produces elliptical polarisation?

Which of following antenna produces elliptical polarisation?

## Maximum usable frequency is [fmuf]

Maximum usable frequency is [fmuf]

## Considerable ionization occurs between the range

Considerable ionization occurs between the range

∇2 is

## T.V. antennas are usually

T.V. antennas are usually

## Dish antennas are

Dish antennas are

## In cell phone antennas are

In cell phone antennas are

## The law J = σE, where J is current density, σ is electrical conductivity and E is field strength is

The law J = σE, where J is current density, σ is electrical conductivity and E is field strength is

## Purpose of antenna is

Purpose of antenna is

## Antenna is a __________ element

Antenna is a __________ element

## Which of the following antennas is λ /4 length?

Which of the following antennas is λ /4 length?

## Which of the following is λ/2 length?

Which of the following is λ/2 length?

## In a rectangular waveguide if operating frequency is greater than cut off frequency then propagation constant is

In a rectangular waveguide if operating frequency is greater than cut off frequency then propagation constant is

## In a rectangular waveguide ZTE . ZTM is

In a rectangular waveguide ZTE . ZTM is

## A transmission line has characteristics impedance of (75 + j 0.01) Ω and is terminated in a load impedance of (70 + j 50) Ω. The reflection coefficient will be

A transmission line has characteristics impedance of (75 + j 0.01) Ω and is terminated in a load impedance of (70 + j 50) Ω. The reflection coefficient will be

## A λ/8 section of transmission line is determined of load impedance of (2 – j 5) Ω. If characteristic impedance of line is 10 Ω. Then input impedance of line is

A λ/8 section of transmission line is determined of load impedance of (2 – j 5) Ω. If characteristic impedance of line is 10 Ω. Then input impedance of line is

## Whenever a wave is incident on a perfect conductor then the reflection coefficient is

Whenever a wave is incident on a perfect conductor then the reflection coefficient is

## A conductor carries 10 A current in + x direction and is lying in a field having a flux density 0.2 T directed along + z direction. The magnitude of force per metre length and direction are

A conductor carries 10 A current in + x direction and is lying in a field having a flux density 0.2 T directed along + z direction. The magnitude of force per metre length and direction are

## Equipotential surfaces about a point charge are in which one of the following forms?

Equipotential surfaces about a point charge are in which one of the following forms?

## Which one of the following statement is correct?

Which one of the following statement is correct?

## A waveguide operated below cut off frequency can be used as

A waveguide operated below cut off frequency can be used as

## Unit of e is __________ .

Unit of e is __________ .

## ZL = 200 Ω and it is desired that Zi = 50 Ω The quarter wave transformer should have a characteristic impedance of

ZL = 200 Ω and it is desired that Zi = 50 Ω The quarter wave transformer should have a characteristic impedance of

## For TE or TM modes of propagation in bounded media, the phase velocity is

For TE or TM modes of propagation in bounded media, the phase velocity is