Uniform Plane Waves - Electronic Engineering (MCQ) questions & answers

1)   If the magnetic field component of a plane wave in a lossless dielectric is H = 50 sin (2π x 106 t – 6x) az  mA/m , what will be the wave velocity?

a. 1.047 x 106 m/s
b. 1.257 x 106 m/s
c. 2.50 x 106 m/s
d. 3 x 106 m/s
Answer  Explanation 

ANSWER: 1.047 x 106 m/s

Explanation:
No explanation is available for this question!
2)   What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication?

a. 1 m – 10 m
b. 1 cm – 10 cm
c. 10 cm – 1 m
d. 0.1 cm – 1 cm
Answer  Explanation 

ANSWER: 1 cm – 10 cm

Explanation:
No explanation is available for this question!
3)   Linear polarization can be obtained only if the wave consists of  ________

a. Ex
b. Ey
c. Both Ex & Ey & in phase
d. Both Ex & Ey & out of phase
Answer  Explanation 

ANSWER: Both Ex & Ey & in phase

Explanation:
No explanation is available for this question!
4)   According to depth of penetration, what is the percentage proportion of attenuated wave w.r.t its original value?

a. 17%
b. 27%
c. 37%
d. 57%
Answer  Explanation 

ANSWER: 37%

Explanation:
No explanation is available for this question!
5)   In an electrical circuit,which nature of impedance causes the current & voltages in phase?

a. Reactive
b. Resistive
c. Capacitive
d. Inductive
Answer  Explanation 

ANSWER: Resistive

Explanation:
No explanation is available for this question!
6)   Which equations are regarded as wave equations in frequency domain for lossless media?

a. Maxwell's
b. Lorentz
c. Helmholtz
d. Poisson's
Answer  Explanation 

ANSWER: Helmholtz

Explanation:
No explanation is available for this question!
7)   Which among the following exhibits perpendicular nature in TEM wave?

a. Electric field
b. Magnetic field
c. Direction of propagation
d. All of the above
Answer  Explanation 

ANSWER: All of the above

Explanation:
No explanation is available for this question!
8)   In which kind of waveform is the phase velocity defined?

a. Sinusoidal
b. Rectangular
c. Square
d. Triangular
Answer  Explanation 

ANSWER: Sinusoidal

Explanation:
No explanation is available for this question!
9)   Wavefront is basically a locus of points acquiring similar _______

a. Phase
b. Frequency
c. Amplitude
d. Wave equation
Answer  Explanation 

ANSWER: Phase

Explanation:
No explanation is available for this question!
10)   Which among the following is an application of high frequency?

a. SONAR
b. Subsurface communication
c. Radio navigation
d. Facsimile
Answer  Explanation 

ANSWER: Facsimile

Explanation:
No explanation is available for this question!

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