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Electromagnetic-theory Questions Set 88:

Quiz Mode

As the frequency is increased, the charging MVAR in a cable

decreases

increases

remain the same

decreases or remains the same

Solution:

How does the beamwidth of an antenna vary upon decreasing the directivity?

Remain unaffected

Decreases

Increases

Depends on antenna type

Solution:

The speed of a D.C. motor can be varied by varying

(a) field current

(b) applied voltage

(d) any of the above

Solution:

Which type of motor is typically chosen to drive a rotary compressor?

(a) DC shunt motor

(b) DC series motor

(d) Synchronous motor

Solution:

What are the three basic phenomena that arise when charged particles are under the influence of external fields?

Conduction

Polarization

Magnetization

All of the above

Solution:

The dominant mode in a rectangular waveguide is TE₁₀, because this mode has

no attenuation

no cut-off frequency

no magnetic field component

the highest cut-off wavelength

Solution:

If the direction of the electric field is away from the charge, what is the sign of the charge?

Positive

Negative

It depends on the potential difference applied

None of the above

Solution:

How does the magnetic compass needle behave in a magnetic field?

It starts rotating

None of the above

It aligns at a right angle to the magnetic field

It aligns with the direction of the magnetic field

Solution:

The statement: Electric displacement is independent of the dielectric constant of the medium. Comment on this statement.

The given statement is absolutely true

The given statement is incomplete

The given statement is incorrect

The given statement is partially true

Solution:

At microwave frequencies, we prefer the waveguides to transmit lines for transporting EM energy because of the following reason, except that

Losses in transmission lines are prohibitively large

Transmission line supports only TEM mode

Waveguides have larger bandwidths and lower signal attenuation

Transmission lines are smaller in size than waveguides

Electromagnetic-theory Questions Set 88:

As the frequency is increased, the charging MVAR in a cable

Solution:

How does the beamwidth of an antenna vary upon decreasing the directivity?

Solution:

The speed of a D.C. motor can be varied by varying

Solution:

Which type of motor is typically chosen to drive a rotary compressor?

Solution:

What are the three basic phenomena that arise when charged particles are under the influence of external fields?

Solution:

The dominant mode in a rectangular waveguide is TE₁₀, because this mode has

Solution:

If the direction of the electric field is away from the charge, what is the sign of the charge?

Solution:

How does the magnetic compass needle behave in a magnetic field?

Solution:

The statement: Electric displacement is independent of the dielectric constant of the medium. Comment on this statement.

Solution:

At microwave frequencies, we prefer the waveguides to transmit lines for transporting EM energy because of the following reason, except that

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 88:

As the frequency is increased, the charging MVAR in a cable

Solution:

How does the beamwidth of an antenna vary upon decreasing the directivity?

Solution:

The speed of a D.C. motor can be varied by varying

Solution:

Which type of motor is typically chosen to drive a rotary compressor?

Solution:

What are the three basic phenomena that arise when charged particles are under the influence of external fields?

Solution:

The dominant mode in a rectangular waveguide is TE10, because this mode has

Solution:

If the direction of the electric field is away from the charge, what is the sign of the charge?

Solution:

How does the magnetic compass needle behave in a magnetic field?

Solution:

The statement: Electric displacement is independent of the dielectric constant of the medium. Comment on this statement.

Solution:

At microwave frequencies, we prefer the waveguides to transmit lines for transporting EM energy because of the following reason, except that

Solution:

Related Question Sets:

Related Topics:

The dominant mode in a rectangular waveguide is TE₁₀, because this mode has