1) Which among the following elucidate the generation of electromagnetic waves?
A. Ampere's law
B. Faraday's law
C. Gauss's law
D. Kirchoff's law
a. A & B
b. B & C
c. A & C
d. B & D
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Answer
Explanation
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ANSWER: A & B
Explanation:
No explanation is available for this question!
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2) In radio communication link, what is the shape/nature of waves generated by transmitting antenna?
a. Spherical
b. Plane
c. Triangular
d. Square
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Answer
Explanation
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ANSWER: Spherical
Explanation:
No explanation is available for this question!
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3) What is the functioning role of an antenna in receiving mode?
a. Radiator
b. Converter
c. Sensor
d. Inverter
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Answer
Explanation
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ANSWER: Sensor
Explanation:
No explanation is available for this question!
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4) In lens antenna, what kind of wave energy is transformed into plane waves?
a. Convergent
b. Divergent
c. Contingent
d. Congruent
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Answer
Explanation
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ANSWER: Divergent
Explanation:
No explanation is available for this question!
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5) Which conversion mechanism is performed by parabolic reflector antenna?
a. Plane to spherical wave
b. Spherical to plane wave
c. Both a and b
d. None of the above
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Answer
Explanation
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ANSWER: Spherical to plane wave
Explanation:
No explanation is available for this question!
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6) Which antennas are renowned as patch antennas especially adopted for space craft applications?
a. Aperture
b. Microstrip
c. Array
d. Lens
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Answer
Explanation
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ANSWER: Microstrip
Explanation:
No explanation is available for this question!
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7) Which type of wire antennas are also known as dipoles?
a. Linear
b. Loop
c. Helical
d. All of the above
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Answer
Explanation
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ANSWER: Linear
Explanation:
No explanation is available for this question!
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8) Under which conditions of charge does the radiation occur through wire antenna?
a. For a charge with no motion
b. For a charge moving with uniform velocity with straight & infinite wire
c. For a charge oscillating in time motion
d. All of the above
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Answer
Explanation
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ANSWER: For a charge oscillating in time motion
Explanation:
No explanation is available for this question!
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9) According to Webster's dictionary, what is an antenna?
a. Impedance matching device
b. Sensor of electromagnetic waves
c. Transducer between guided wave & free space wave
d. Metallic device for radiating or receiving radio waves
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Answer
Explanation
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ANSWER: Metallic device for radiating or receiving radio waves
Explanation:
No explanation is available for this question!
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10) The knowledge of which parameter is sufficient for deriving the time varying electromagnetic field?
a. Electric field intensity
b. Magnetic field intensity
c. Current density
d. Power density
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Answer
Explanation
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ANSWER: Current density
Explanation:
No explanation is available for this question!
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