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Electromagnetic-theory Questions Set 81:

Quiz Mode

Find the load current of a 50 Ω transmission line when the source voltage is 100 V.

1 A

2 A

3 A

4 A

Solution:

The XEROX machine works on the principle of:

Peltier effect

Electrostatic effect

Magnetic effect

Heating effect of current

Solution:

Which type of DC motor is generally preferred for cranes and hoists?

Series motor

Shunt motor

Air motor

Battery operated motor

Solution:

In D.C. machines, the residual magnetism is typically in the range of:

2 to 3 percent

10 to 15 percent

20 to 25 percent

50 to 75 percent

Solution:

The hot electric iron has a resistance of 80 ohms and is used on a 200 volt source. The electrical energy spent if it is used for 2 hours will be:

800 Wh

2000 Wh

1000 Wh

8000 Wh

Solution:

A conducting material has a conduction current density of 150 units and an electric field of 4 units. Find the conductivity of the material.

37.5 units

75 units

600 units

300 units

Solution:

A plane wave is travelling in the z direction and has the electric field components in the x and y directions. The components are given as:

E_x = 3 cos(ωt)

E_y = 3 sin(ωt)

What is the polarization of the wave?

Linear

Circular

Parabolic

Elliptical

Solution:

An antenna has a power input of 40π watts and an efficiency of 90%. The radiation intensity has been found to have a maximum value of 150 watts per unit solid angle. Given the above parameters, what is the directivity of the antenna?

50/3

π × (15/4)

π × (15/3.6)

Solution:

Unpolarized light of intensity I is incident on the surface of a block of glass at Brewster's angle. Which one of the following statements is true?

Reflected light is completely polarized with intensity less than I/2

Transmitted light is completely polarized with intensity less than I/2

Transmitted light is partially polarized with intensity I/2

Reflected light is partially polarized with intensity I/2

Electromagnetic-theory Questions Set 81:

Find the load current of a 50 Ω transmission line when the source voltage is 100 V.

Solution:

The XEROX machine works on the principle of:

Solution:

Which type of DC motor is generally preferred for cranes and hoists?

Solution:

In D.C. machines, the residual magnetism is typically in the range of:

Solution:

The hot electric iron has a resistance of 80 ohms and is used on a 200 volt source. The electrical energy spent if it is used for 2 hours will be:

Solution:

A conducting material has a conduction current density of 150 units and an electric field of 4 units. Find the conductivity of the material.

Solution:

A plane wave is travelling in the z direction and has the electric field components in the x and y directions. The components are given as:

E_x = 3 cos(ωt)

E_y = 3 sin(ωt)

What is the polarization of the wave?

Solution:

An antenna has a power input of 40π watts and an efficiency of 90%. The radiation intensity has been found to have a maximum value of 150 watts per unit solid angle. Given the above parameters, what is the directivity of the antenna?

Solution:

Unpolarized light of intensity I is incident on the surface of a block of glass at Brewster's angle. Which one of the following statements is true?

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 81:

Find the load current of a 50 Ω transmission line when the source voltage is 100 V.

Solution:

The XEROX machine works on the principle of:

Solution:

Which type of DC motor is generally preferred for cranes and hoists?

Solution:

In D.C. machines, the residual magnetism is typically in the range of:

Solution:

The hot electric iron has a resistance of 80 ohms and is used on a 200 volt source. The electrical energy spent if it is used for 2 hours will be:

Solution:

A conducting material has a conduction current density of 150 units and an electric field of 4 units. Find the conductivity of the material.

Solution:

A plane wave is travelling in the z direction and has the electric field components in the x and y directions. The components are given as: Ex = 3 cos(ωt) Ey = 3 sin(ωt) What is the polarization of the wave?

Solution:

An antenna has a power input of 40π watts and an efficiency of 90%. The radiation intensity has been found to have a maximum value of 150 watts per unit solid angle. Given the above parameters, what is the directivity of the antenna?

Solution:

Unpolarized light of intensity I is incident on the surface of a block of glass at Brewster's angle. Which one of the following statements is true?

Solution:

Related Question Sets:

Related Topics:

A plane wave is travelling in the z direction and has the electric field components in the x and y directions. The components are given as:

E_x = 3 cos(ωt)

E_y = 3 sin(ωt)

What is the polarization of the wave?