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Electromagnetic-theory Questions Set 19:

Quiz Mode

When a high-energy UV photon beam enters an electric field, it will be:

Accelerated

Retarded

Undeflected

None of these

Solution:

In which type of material is the magnetic susceptibility independent of temperature?

Diamagnetic

Paramagnetic

Ferromagnetic

Ferrite

Solution:

In a DC motor, which of the following can sustain the maximum temperature rise?

(a) Slip rings

(b) Commutator

(d) Armature winding

Solution:

If the electric flux density, D = 0.3r² nC/m² in free space, what is the total electric charge within the sphere at r = 3 m?

305 nC

305 pC

305 C

None of the above

Solution:

Biot-Savart's law states the relation between magnetic intensity and

filament current only

surface current only

(A), (B), and (D) are all correct

volume current only

Solution:

What parameter determines the phase shift between the electric and magnetic fields in an electromagnetic (EM) wave?

Phase constant

Attenuation constant

Propagation constant

Intrinsic impedance

Solution:

Consider the interface between two magnetic media to have zero surface charge density, 0 A/m. Which of the following equations is NOT TRUE in this case?

H_t1 = H_t2

(B_t1/μ₁) = (B_t2/μ₂)

H_t1 - H_t2 = 0

(B_t1/μ₂) = (B_t2/μ₁)

Solution:

When is the torque of a conductor defined?

The field is perpendicular to the loop

The plane of the loop is parallel to the field

The plane of the loop is perpendicular to the current direction

The field and the current direction are the same

Solution:

Two point charges of +10 μC and -10 μC are placed at points A and B. If P and Q are the points lying on the perpendicular bisector of the line AB, the work done in taking a charge of 5 μC from P to Q will be:

Zero

Equal to the distance between P and Q

Equal to the distance between A and B

Either (a) or (c)

Solution:

Why are DC motors preferred for traction applications?

(a) Torque and speed are inversely proportional to armature current

(b) Torque is proportional to armature current

(d) Speed is inversely proportional to torque, and torque is proportional to square of armature current

Electromagnetic-theory Questions Set 19:

When a high-energy UV photon beam enters an electric field, it will be:

Solution:

In which type of material is the magnetic susceptibility independent of temperature?

Solution:

In a DC motor, which of the following can sustain the maximum temperature rise?

Solution:

If the electric flux density, D = 0.3r² nC/m² in free space, what is the total electric charge within the sphere at r = 3 m?

Solution:

Biot-Savart's law states the relation between magnetic intensity and

Solution:

What parameter determines the phase shift between the electric and magnetic fields in an electromagnetic (EM) wave?

Solution:

Consider the interface between two magnetic media to have zero surface charge density, 0 A/m. Which of the following equations is NOT TRUE in this case?

Solution:

When is the torque of a conductor defined?

Solution:

Two point charges of +10 μC and -10 μC are placed at points A and B. If P and Q are the points lying on the perpendicular bisector of the line AB, the work done in taking a charge of 5 μC from P to Q will be:

Solution:

Why are DC motors preferred for traction applications?

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 19:

When a high-energy UV photon beam enters an electric field, it will be:

Solution:

In which type of material is the magnetic susceptibility independent of temperature?

Solution:

In a DC motor, which of the following can sustain the maximum temperature rise?

Solution:

If the electric flux density, D = 0.3r2 nC/m2 in free space, what is the total electric charge within the sphere at r = 3 m?

Solution:

Biot-Savart's law states the relation between magnetic intensity and

Solution:

What parameter determines the phase shift between the electric and magnetic fields in an electromagnetic (EM) wave?

Solution:

Consider the interface between two magnetic media to have zero surface charge density, 0 A/m. Which of the following equations is NOT TRUE in this case?

Solution:

When is the torque of a conductor defined?

Solution:

Two point charges of +10 μC and -10 μC are placed at points A and B. If P and Q are the points lying on the perpendicular bisector of the line AB, the work done in taking a charge of 5 μC from P to Q will be:

Solution:

Why are DC motors preferred for traction applications?

Solution:

Related Question Sets:

Related Topics:

If the electric flux density, D = 0.3r² nC/m² in free space, what is the total electric charge within the sphere at r = 3 m?