Jobs By Abekus

Electromagnetic-theory Questions Set 26:

Quiz Mode

1 Tesla = _____

1 wb- m^2

1 wb

1 wb/m

1 wb/m^2

Solution:

The ability of a material to retain its magnetism is called _____.

Remanence

Magnetism

Coercivity

Magnetic Susceptibility

Solution:

If the magnetic flux (∮) varies with time as ∮ = t⁴/8, find the magnitude of EMF induced at time t = 2 seconds.

4 V

8 V

2 V

6 V

Solution:

The electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its center is:

Q / 4π

Q / 6

4πQ / 6ε₀

Q / (6ε₀)

Solution:

Which of the following depicts the correct relation between velocity factor (V_F) and relative permittivity (K) of a dielectric?

V_F = √K

V_F = 1/√K

V_F = K

V_F = K^2

Solution:

The current drawn by the armature of a D.C. motor is directly proportional to

(a) the torque required

(b) the speed of the motor

(d) none of the above

Solution:

The capacitance of a conductor depends upon which of the following factors?

Size and shape of the conductor.

Nature of the surrounding medium.

All of the above.

Presence of other conductors in its neighbourhood.

Solution:

A two-conductor transmission line is 10 cm long, and a sinusoidal signal with a speed of 2 × 10⁸ m/s and a peak amplitude of 1 V is applied to one end of this line. What is the frequency at which the transit time is 10% of the signal period (in MHz)?

100 MHz

200 MHz

10 MHz

20 MHz

Solution:

Consider the following case and choose the option that accurately describes the relationship between the normal components of the electric displacement vectors at the interface between two dielectrics:

If the interface has a non-zero surface charge density, ρ_s C/m², then what is the value of D_n1 - D_n2?

ρ_s

ρ_v

ε_v

ε_s

Solution:

To prevent a heavy current from flowing through the armature circuit of a DC motor at the instant of starting, when there is no back e.m.f.,

(a) a resistance is connected in series with armature

(b) a resistance is connected parallel to the armature

(d) a high value resistor is connected across the field winding

Electromagnetic-theory Questions Set 26:

1 Tesla = _____

Solution:

The ability of a material to retain its magnetism is called _____.

Solution:

If the magnetic flux (∮) varies with time as ∮ = t⁴/8, find the magnitude of EMF induced at time t = 2 seconds.

Solution:

The electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its center is:

Solution:

Which of the following depicts the correct relation between velocity factor (V_F) and relative permittivity (K) of a dielectric?

Solution:

The current drawn by the armature of a D.C. motor is directly proportional to

Solution:

The capacitance of a conductor depends upon which of the following factors?

Solution:

A two-conductor transmission line is 10 cm long, and a sinusoidal signal with a speed of 2 × 10⁸ m/s and a peak amplitude of 1 V is applied to one end of this line. What is the frequency at which the transit time is 10% of the signal period (in MHz)?

Solution:

Solution:

To prevent a heavy current from flowing through the armature circuit of a DC motor at the instant of starting, when there is no back e.m.f.,

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 26:

1 Tesla = _____

Solution:

The ability of a material to retain its magnetism is called _____.

Solution:

If the magnetic flux (∮) varies with time as ∮ = t4/8, find the magnitude of EMF induced at time t = 2 seconds.

Solution:

The electric flux in coulombs emanating from any surface of a cube containing C coulombs of charge at its center is:

Solution:

Which of the following depicts the correct relation between velocity factor (VF) and relative permittivity (K) of a dielectric?

Solution:

The current drawn by the armature of a D.C. motor is directly proportional to

Solution:

The capacitance of a conductor depends upon which of the following factors?

Solution:

A two-conductor transmission line is 10 cm long, and a sinusoidal signal with a speed of 2 × 108 m/s and a peak amplitude of 1 V is applied to one end of this line. What is the frequency at which the transit time is 10% of the signal period (in MHz)?

Solution:

Solution:

To prevent a heavy current from flowing through the armature circuit of a DC motor at the instant of starting, when there is no back e.m.f.,

Solution:

Related Question Sets:

Related Topics:

If the magnetic flux (∮) varies with time as ∮ = t⁴/8, find the magnitude of EMF induced at time t = 2 seconds.

Which of the following depicts the correct relation between velocity factor (V_F) and relative permittivity (K) of a dielectric?

A two-conductor transmission line is 10 cm long, and a sinusoidal signal with a speed of 2 × 10⁸ m/s and a peak amplitude of 1 V is applied to one end of this line. What is the frequency at which the transit time is 10% of the signal period (in MHz)?