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Electromagnetic-theory Questions Set 71:

Quiz Mode

The charge carriers in a superconductor are

Electrons

Protons

Photons

Phonons

Solution:

Calculate the magnetic energy when the magnetic flux density is 32 × 10⁸ units.

3.37

1.02

4.07

2.52

Solution:

Why can X-rays not be diffracted by an ordinary grating?

High speed

Large wavelength

Short wavelength

None of these

Solution:

If a four-patch array produces a directivity of 8π, what is the beam area (in steradians, Sr)?

50 Sr

0.05 Sr

0.5 Sr

5 Sr

Solution:

Which of the following expressions correctly represents the electric field strength?

E = πD^2

E = πD

E = D^2 / ε

E = D / ε

Solution:

Differentially compound D.C. motors can find applications requiring

low starting torque

high starting torque

variable speed

frequent on-off cycles

Solution:

The diagram that shows the distance-time history of electrons in a klystron amplifier is called

asynchronous diagram

bunching diagram

velocity modulation diagram

Applegate diagram

Solution:

Which of the following statements about divergence is false?

Both 1 and 2

Both 2 and 3

The result of divergence is always a vector

Divergence is an operation performed on a vector

Divergence tells about the direction

Solution:

Coulomb's law is applicable under which of the following conditions?

The electric charges must be at rest

The electric charges must be point charges

All of the above

The separation between the charges must be greater than the nuclear size

Solution:

During the propagation of electromagnetic waves in a medium, the electric energy density and magnetic energy density are:

Electric energy density is double of the magnetic energy density

Electric energy density is half of the magnetic energy density

Electric energy density is equal to the magnetic energy density

Both electric and magnetic energy density are zero

Electromagnetic-theory Questions Set 71:

The charge carriers in a superconductor are

Solution:

Calculate the magnetic energy when the magnetic flux density is 32 × 10⁸ units.

Solution:

Why can X-rays not be diffracted by an ordinary grating?

Solution:

If a four-patch array produces a directivity of 8π, what is the beam area (in steradians, Sr)?

Solution:

Which of the following expressions correctly represents the electric field strength?

Solution:

Differentially compound D.C. motors can find applications requiring

Solution:

The diagram that shows the distance-time history of electrons in a klystron amplifier is called

Solution:

Which of the following statements about divergence is false?

Solution:

Coulomb's law is applicable under which of the following conditions?

Solution:

During the propagation of electromagnetic waves in a medium, the electric energy density and magnetic energy density are:

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 71:

The charge carriers in a superconductor are

Solution:

Calculate the magnetic energy when the magnetic flux density is 32 × 108 units.

Solution:

Why can X-rays not be diffracted by an ordinary grating?

Solution:

If a four-patch array produces a directivity of 8π, what is the beam area (in steradians, Sr)?

Solution:

Which of the following expressions correctly represents the electric field strength?

Solution:

Differentially compound D.C. motors can find applications requiring

Solution:

The diagram that shows the distance-time history of electrons in a klystron amplifier is called

Solution:

Which of the following statements about divergence is false?

Solution:

Coulomb's law is applicable under which of the following conditions?

Solution:

During the propagation of electromagnetic waves in a medium, the electric energy density and magnetic energy density are:

Solution:

Related Question Sets:

Related Topics:

Calculate the magnetic energy when the magnetic flux density is 32 × 10⁸ units.