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Electromagnetic-theory Questions Set 67:

Quiz Mode

Which type of electromagnetic radiation has the shortest wavelength?

Gamma rays

X-rays

Infrared

Ultraviolet

Solution:

The reciprocal of impedance in an AC circuit is called?

Susceptance

Conductance

Admittance

Transconductance

Solution:

If the power of a wave is 0.025 units, what is its electric field intensity in air?

18.85 units

9.42 units

4.34 units

2.17 units

Solution:

The initial velocity of a Reflex Klystron oscillator given that the beam voltage is 250 V is

Not enough details to predict

12.87 V

512 kV

9.36 V

Solution:

A wave passes through two media with intrinsic impedances of 2.5 and 3.6 respectively. Find the reflection coefficient of the wave.

5.54

0.18

3.27

2.27

Solution:

Light with an energy flux of 18 W/cm² falls on a non-reflecting surface at normal incidence. The pressure exerted on the surface is

2 N/m²

6 N/m²

2×10⁻⁴ N/m²

6×10⁻⁴ N/m²

Solution:

Out of the given options, which one is NOT the correct form of Maxwell's equation for time-varying fields?

∇ · D' = ρv

∇ × H' = J' + ∂D'/∂t

∮ B' · ds' = 0

∇ · E' = -∂B'/∂t

Solution:

An infinite uniform line charge of 5 nC/m lies along the positive and negative x and y axes in free space. Find the electric field at point P (0, 0, 4).

None of the above

45 a_x

45 a_y

45 a_z

Solution:

Which type of antenna array has its region of maximum power radiation in quadrature (perpendicular) to the reference axis?

Broadside array

End fire array

Extended end fire array

Collinear array

Solution:

Why are nichrome and manganin widely used in wire-wound standard resistors?

They have temperature-independent resistivity

They have very weakly temperature-dependent resistivity

They have strong dependence of resistivity on temperature

They have high mechanical strength

Electromagnetic-theory Questions Set 67:

Which type of electromagnetic radiation has the shortest wavelength?

Solution:

The reciprocal of impedance in an AC circuit is called?

Solution:

If the power of a wave is 0.025 units, what is its electric field intensity in air?

Solution:

The initial velocity of a Reflex Klystron oscillator given that the beam voltage is 250 V is

Solution:

A wave passes through two media with intrinsic impedances of 2.5 and 3.6 respectively. Find the reflection coefficient of the wave.

Solution:

Light with an energy flux of 18 W/cm² falls on a non-reflecting surface at normal incidence. The pressure exerted on the surface is

Solution:

Out of the given options, which one is NOT the correct form of Maxwell's equation for time-varying fields?

Solution:

An infinite uniform line charge of 5 nC/m lies along the positive and negative x and y axes in free space. Find the electric field at point P (0, 0, 4).

Solution:

Which type of antenna array has its region of maximum power radiation in quadrature (perpendicular) to the reference axis?

Solution:

Why are nichrome and manganin widely used in wire-wound standard resistors?

Solution:

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