Terms, Definitions, MCQs and Free Templates

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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

∇2 is

Radar antennas are

Radar antennas are

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