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Electromagnetic-theory Questions Set 72:

Quiz Mode

The optimum efficieny of Reflex Klystron is

27%

54.87%

22.7%

28.89%

Solution:

Condition for a TEM mode is:

Hz= 0 & Hy= 0

Hz= 0 & Hx != 0

Ez= 0 & Ex != 0

Solution:

A rectangular waveguide has dimensions of 5 cm x 3 cm. Find the cutoff wavelength of the waveguide in the dominant mode.

6 cm

10 cm

15 cm

30 cm

Solution:

A wave with a voltage of 320 V has a characteristic impedance of 125 Ω. Calculate the power of the wave.

409.6 units

819.2 units

2.56 units

5.12 units

Solution:

D.C. generators are normally designed for maximum efficiency around their rated r.p.m.

(a) full-load

(b) rated r.p.m

(d) all of the above

Solution:

The charge density of a material is 20 units per volume region of 1.5 units. Find the electric flux density of the material.

0.075 units

13.33 units

30 units

45 units

Solution:

If the supply voltage for a D.C. motor is increased, which of the following will decrease?

(a) Starting torque

(b) Operating speed

(d) All of the above

Solution:

What are the rectangular coordinates of a point whose cylindrical coordinates are ρ=4.4, Φ=-115°, and z=2?

x=-1.859, y=-3.987, z=2

x=3.987, y=-1.987, z=2

x=-2, y=3.987, z=1.859

x=4.4, y=3.987, z=2

Solution:

If a charged particle is moving in a uniform magnetic field, then

Both momentum and total energy remain the same

Its total energy changes but momentum remains the same

Both momentum and total energy will change

Its momentum changes but total energy remains the same

Solution:

At 30 MHz, a half-wave dipole antenna operates with a maximum directive gain of 1.5. A plane wave carrying π² watts of power per square meter is incident on the antenna. Assuming the antenna is 100% efficient, the power received by the antenna (in watts) will be:

108.9

117.8

115.8

100.2

Electromagnetic-theory Questions Set 72:

The optimum efficieny of Reflex Klystron is

Solution:

Condition for a TEM mode is:

Solution:

A rectangular waveguide has dimensions of 5 cm x 3 cm. Find the cutoff wavelength of the waveguide in the dominant mode.

Solution:

A wave with a voltage of 320 V has a characteristic impedance of 125 Ω. Calculate the power of the wave.

Solution:

D.C. generators are normally designed for maximum efficiency around their rated r.p.m.

Solution:

The charge density of a material is 20 units per volume region of 1.5 units. Find the electric flux density of the material.

Solution:

If the supply voltage for a D.C. motor is increased, which of the following will decrease?

Solution:

What are the rectangular coordinates of a point whose cylindrical coordinates are ρ=4.4, Φ=-115°, and z=2?

Solution:

If a charged particle is moving in a uniform magnetic field, then

Solution:

At 30 MHz, a half-wave dipole antenna operates with a maximum directive gain of 1.5. A plane wave carrying π² watts of power per square meter is incident on the antenna. Assuming the antenna is 100% efficient, the power received by the antenna (in watts) will be:

Solution:

Related Question Sets:

Related Topics:

Electromagnetic-theory Questions Set 72:

The optimum efficieny of Reflex Klystron is

Solution:

Condition for a TEM mode is:

Solution:

A rectangular waveguide has dimensions of 5 cm x 3 cm. Find the cutoff wavelength of the waveguide in the dominant mode.

Solution:

A wave with a voltage of 320 V has a characteristic impedance of 125 Ω. Calculate the power of the wave.

Solution:

D.C. generators are normally designed for maximum efficiency around their rated r.p.m.

Solution:

The charge density of a material is 20 units per volume region of 1.5 units. Find the electric flux density of the material.

Solution:

If the supply voltage for a D.C. motor is increased, which of the following will decrease?

Solution:

What are the rectangular coordinates of a point whose cylindrical coordinates are ρ=4.4, Φ=-115°, and z=2?

Solution:

If a charged particle is moving in a uniform magnetic field, then

Solution:

At 30 MHz, a half-wave dipole antenna operates with a maximum directive gain of 1.5. A plane wave carrying π2 watts of power per square meter is incident on the antenna. Assuming the antenna is 100% efficient, the power received by the antenna (in watts) will be:

Solution:

Related Question Sets:

Related Topics:

At 30 MHz, a half-wave dipole antenna operates with a maximum directive gain of 1.5. A plane wave carrying π² watts of power per square meter is incident on the antenna. Assuming the antenna is 100% efficient, the power received by the antenna (in watts) will be: