Top 250+ Solved Electromagnetic Field MCQ Questions Answer
Q. Displacement current density ____________ current passingthrough a capacitor.
a. Represents
b. Does not represent
c. Is the same as
d. None of these
Q. Line integral of an electric field around a closed path is __________.
a. infinity
b. unity
c. zero
d. None of these
Q. __________ are caused by accelerated charges
a. Time-varying fields
b. Waves
c. Both (a) and (b)
d. None of these
Q. At the Brewster angle, polarization ______________.
a. Cannot be reflected
b. Is reflected at 30°
c. Is reflected at 90°
d. None of these
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
Q. Power density has _________________.
a. A DC component
b. A second harmonic component
c. Both (a) and (b)
d. None of these
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
Q. The Smith chart is a ________ dimensional representation ofcomplex impedances with respect to coordinates.
a. Two
b. Three
c. Four
d. None of these
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
Q. Smith charts depict a wide impedance range of transmitter for _______VSWR.
a. Low
b. High
c. Medium
d. None of these
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
Q. Transmission lines facilitate _________propagation of energy.
a. Guided
b. Unguided
c. None of these
d. Cannot say
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