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Electromagnetic-theory Questions Set 44:

Quiz Mode

The bright colors exhibited by a spider's web when exposed to sunlight are due to:

Diffraction

Interference

Polarization

Resolution

Solution:

Find the Lorentz force on a charge of 2.5 C in an electric field of 5 units and a magnetic field of 7.25 units, given the velocity is 1.5 m/s.

69.42

45.63

39.68

56.65

Solution:

A conductor of length L has current I passing through it when it is placed parallel to a strong magnetic field. The force experienced by the conductor will be:

BIL

BI(L^2)

B(I^2)L

zero

Solution:

The hysteresis loss in a D.C. machine least depends on

(a) Frequency of magnetic reversals

(b) Maximum value of flux density

(d) Rate of flow of ventilating air

Solution:

An AC voltage is applied to a pure inductor L, the current in the inductor would be

Ahead of the voltage by 90°

Lagging the voltage by 90°

Ahead of the voltage by 45°

Lagging the voltage by 75°

Solution:

The susceptibility of a ferromagnetic material is

Directly proportional to temperature

Inversely proportional to temperature

Independent of temperature

Inversely proportional to the square of temperature

Solution:

The power of the wave in a cylindrical waveguide is 3.6 units with an electric field of 16 units. Calculate the radius of the cylindrical waveguide.
Consider the medium to be air.

3.375 m

1.84 m

1.69 m

1.3 m

Solution:

Why can't alternating current (AC) be measured by a direct current (DC) ammeter?

AC cannot pass through an AC ammeter

AC changes direction

The average value of current over a complete AC cycle is zero

An AC ammeter will get damaged

Solution:

A 0.2 F capacitor is charged to 600 V by a battery. After removing the battery, the capacitor is connected in parallel with another capacitor of 1 F. What is the final potential difference across the two capacitors?

100 V

300 V

120 V

600 V

Solution:

Consider the following case and choose the option that accurately fits:

In the case of boundary conditions at the interface between two dielectrics, if the interface is charge-free (ρ_s = 0 C/m²), what is the value of ∈₁E_n1 - ∈₂E_n2?

unity

infinity

zero

cannot be determined

Electromagnetic-theory Questions Set 44:

The bright colors exhibited by a spider's web when exposed to sunlight are due to:

Solution:

Find the Lorentz force on a charge of 2.5 C in an electric field of 5 units and a magnetic field of 7.25 units, given the velocity is 1.5 m/s.

Solution:

A conductor of length L has current I passing through it when it is placed parallel to a strong magnetic field. The force experienced by the conductor will be:

Solution:

The hysteresis loss in a D.C. machine least depends on

Solution:

An AC voltage is applied to a pure inductor L, the current in the inductor would be

Solution:

The susceptibility of a ferromagnetic material is

Solution:

The power of the wave in a cylindrical waveguide is 3.6 units with an electric field of 16 units. Calculate the radius of the cylindrical waveguide.
Consider the medium to be air.

Solution:

Why can't alternating current (AC) be measured by a direct current (DC) ammeter?

Solution:

A 0.2 F capacitor is charged to 600 V by a battery. After removing the battery, the capacitor is connected in parallel with another capacitor of 1 F. What is the final potential difference across the two capacitors?

Solution:

Consider the following case and choose the option that accurately fits:

In the case of boundary conditions at the interface between two dielectrics, if the interface is charge-free (ρ_s = 0 C/m²), what is the value of ∈₁E_n1 - ∈₂E_n2?

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 44:

The bright colors exhibited by a spider's web when exposed to sunlight are due to:

Solution:

Find the Lorentz force on a charge of 2.5 C in an electric field of 5 units and a magnetic field of 7.25 units, given the velocity is 1.5 m/s.

Solution:

A conductor of length L has current I passing through it when it is placed parallel to a strong magnetic field. The force experienced by the conductor will be:

Solution:

The hysteresis loss in a D.C. machine least depends on

Solution:

An AC voltage is applied to a pure inductor L, the current in the inductor would be

Solution:

The susceptibility of a ferromagnetic material is

Solution:

The power of the wave in a cylindrical waveguide is 3.6 units with an electric field of 16 units. Calculate the radius of the cylindrical waveguide.Consider the medium to be air.

Solution:

Why can't alternating current (AC) be measured by a direct current (DC) ammeter?

Solution:

A 0.2 F capacitor is charged to 600 V by a battery. After removing the battery, the capacitor is connected in parallel with another capacitor of 1 F. What is the final potential difference across the two capacitors?

Solution:

Consider the following case and choose the option that accurately fits: In the case of boundary conditions at the interface between two dielectrics, if the interface is charge-free (ρs = 0 C/m2), what is the value of ∈1En1 - ∈2En2?

Solution:

Related Question Sets:

Related Topics:

The power of the wave in a cylindrical waveguide is 3.6 units with an electric field of 16 units. Calculate the radius of the cylindrical waveguide.
Consider the medium to be air.

Consider the following case and choose the option that accurately fits:

In the case of boundary conditions at the interface between two dielectrics, if the interface is charge-free (ρ_s = 0 C/m²), what is the value of ∈₁E_n1 - ∈₂E_n2?