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Electromagnetic-theory Questions Set 27:

Quiz Mode

Which of the following elements is diamagnetic?

Aluminium

Cobalt

Nickel

Bismuth

Solution:

Find the value of cos θ when the phase velocity is given as 12 × 10⁸ m/s.

Solution:

The beam solid angle of an antenna whose directivity is 13.956 is ______

0.87

0.9

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Solution:

What is the bandwidth between first null for a broadside N-isotropic antenna with N = 65, and distance of separation is λ/2?

3.141°

3.52°

2.90°

3.99°

Solution:

The Ward Leonard method of speed control provides uniform speed variation:

(a) In one direction only

(b) In both directions

(d) Above normal speed only

Solution:

The power of a wave is 160 units and the RMS value of the magnetic field, H, is 25 units. Calculate the RMS value of the electric field, Erms.

9.05 units

12.50 units

35.35 units

6.40 units

Solution:

Consider an antenna with the following parameters:

Efficiency (η) = 95%

Maximum radiation intensity (U_max) = 0.5 W/sr

and Input power (P_in) = 0.4 W

What is the Directivity of the Antenna (D) in dB?

11.10

16.53

18.12

12.18

Solution:

Where a D.C. motor of 12 HP or more requires frequent starting, stopping, reversing, and speed control, which type of controller is used?

(a) Drum type controller is used

(b) Three-point starter is used

(d) All of the above can be used

Solution:

Two infinite parallel metal plates are charged with an equal surface charge density of the same polarity. The electric field in the gap between the plates is:

same as that produced by one plate

double the field produced by one plate

dependent on coordinates of field points

zero

Solution:

Read the following statement carefully and select the option that accurately describes it:

"Poisson's equation is the special case of Laplace's equation in a charge-free medium"

The statement is partially true

The statement is entirely true

The statement is incomplete

The statement is entirely untrue

Electromagnetic-theory Questions Set 27:

Which of the following elements is diamagnetic?

Solution:

Find the value of cos θ when the phase velocity is given as 12 × 10⁸ m/s.

Solution:

The beam solid angle of an antenna whose directivity is 13.956 is ______

Solution:

What is the bandwidth between first null for a broadside N-isotropic antenna with N = 65, and distance of separation is λ/2?

Solution:

The Ward Leonard method of speed control provides uniform speed variation:

Solution:

The power of a wave is 160 units and the RMS value of the magnetic field, H, is 25 units. Calculate the RMS value of the electric field, Erms.

Solution:

Consider an antenna with the following parameters:

Efficiency (η) = 95%

Maximum radiation intensity (U_max) = 0.5 W/sr

and Input power (P_in) = 0.4 W

What is the Directivity of the Antenna (D) in dB?

Solution:

Where a D.C. motor of 12 HP or more requires frequent starting, stopping, reversing, and speed control, which type of controller is used?

Solution:

Two infinite parallel metal plates are charged with an equal surface charge density of the same polarity. The electric field in the gap between the plates is:

Solution:

Read the following statement carefully and select the option that accurately describes it:

"Poisson's equation is the special case of Laplace's equation in a charge-free medium"

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 27:

Which of the following elements is diamagnetic?

Solution:

Find the value of cos θ when the phase velocity is given as 12 × 108 m/s.

Solution:

The beam solid angle of an antenna whose directivity is 13.956 is ______

Solution:

What is the bandwidth between first null for a broadside N-isotropic antenna with N = 65, and distance of separation is λ/2?

Solution:

The Ward Leonard method of speed control provides uniform speed variation:

Solution:

The power of a wave is 160 units and the RMS value of the magnetic field, H, is 25 units. Calculate the RMS value of the electric field, Erms.

Solution:

Consider an antenna with the following parameters: Efficiency (η) = 95% Maximum radiation intensity (Umax) = 0.5 W/sr and Input power (Pin) = 0.4 W What is the Directivity of the Antenna (D) in dB?

Solution:

Where a D.C. motor of 12 HP or more requires frequent starting, stopping, reversing, and speed control, which type of controller is used?

Solution:

Two infinite parallel metal plates are charged with an equal surface charge density of the same polarity. The electric field in the gap between the plates is:

Solution:

Read the following statement carefully and select the option that accurately describes it: "Poisson's equation is the special case of Laplace's equation in a charge-free medium"

Solution:

Related Question Sets:

Related Topics:

Find the value of cos θ when the phase velocity is given as 12 × 10⁸ m/s.

Consider an antenna with the following parameters:

Efficiency (η) = 95%

Maximum radiation intensity (U_max) = 0.5 W/sr

and Input power (P_in) = 0.4 W

What is the Directivity of the Antenna (D) in dB?

Read the following statement carefully and select the option that accurately describes it:

"Poisson's equation is the special case of Laplace's equation in a charge-free medium"