Top 250+ Solved Electromagnetic Field MCQ Questions Answer

From 121 to 135 of 224

Q. Displacement current density ____________ current passingthrough a capacitor.

a. Represents

b. Does not represent

c. Is the same as

d. None of these

  • b. Does not represent

Q. Line integral of an electric field around a closed path is __________.

a. infinity

b. unity

c. zero

d. None of these

  • c. zero

Q. __________ are caused by accelerated charges

a. Time-varying fields

b. Waves

c. Both (a) and (b)

d. None of these

  • c. Both (a) and (b)

Q. At the Brewster angle, polarization ______________.

a. Cannot be reflected

b. Is reflected at 30°

c. Is reflected at 90°

d. None of these

  • a. Cannot be reflected

Q. Wave number has units of____________.

a. Radians

b. Meter

c. Radians/meter

d. None of these

  • c. Radians/meter

Q. In the case of a perfect dielectric medium, phase constant______________ as conductivity increases.

a. Increases

b. Decreases

c. Remains unchanged

d. None of these

  • a. Increases

Q. In good conductors, rate of attenuation is __________.

a. Small

b. Large

c. Infinity

d. Zero

  • c. Infinity

Q. Power density has _________________.

a. A DC component

b. A second harmonic component

c. Both (a) and (b)

d. None of these

  • c. Both (a) and (b)

Q. Standing wave consists of two travelling waves of ____________ amplitudes and _____________ is direction.

a. Unequal, same

b. Unequal, opposite

c. Equal, same

d. Equal, opposite

  • d. Equal, opposite

Q. In a _________ transmission line, the reflection coefficient domain isa circle of unitary radius.

a. Lossy

b. Lossless

c. None of these

d. Cannot say

  • b. Lossless

Q. Smith charts depict a wide impedance range of transmitter for _______VSWR.

a. Low

b. High

c. Medium

d. None of these

  • b. High

Q. A cable or a wire is considered as a transmission line if its length is _________of the wavelength of the signal travelling through it.

a. Greater than 1/10

b. Less than 1/10

c. Greater than 1/5

d. Less than 1/5

  • a. Greater than 1/10

Q. Transmission lines facilitate _________propagation of energy.

a. Guided

b. Unguided

c. None of these

d. Cannot say

  • a. Guided

Q. A transmission line is specified in terms of _________.

a. R, G,L

b. G, L,C

c. R, G, L,C

d. None of these

  • c. R, G, L,C
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