Hertzian Dipole MCQ’s

Antenna Electronics & Communication Engineering

This set of Antenna Multiple Choice Questions & Answers (MCQs) focuses on “Hertzian Dipole”.

1. Power radiated by a Hertzian dipole of length λ/30 and carrying a current 2A?
a) 0.87W
b) 3.51W
c) 2.51W
d) 8.77W

2. A Hertzian dipole consists of two _____ and ______ charges separated by a very short distance.
a) unequal, opposite
b) equal, same
c) equal, opposite
d) unequal, same

3. Hertzian dipole carries which type of current throughout its length while radiating?
a) Varying
b) Constant
c) Depends on type of polarization
d) Depends on radiation resistance

4. When Hertzian dipole is connected to a practical antenna, which of the following fields is observed to be absent when a uniform current flow is observed?
a) Radiation field
b) Induction field
c) Electrostatic field
d) Both radiation and Induction Field

5. If the radiation resistance of a Hertzian dipole is 100Ω, then the radiation resistance of short dipole is ____Ω.
a) 25
b) 50
c) 73
d) 35.6

6. The radiation resistance of a monopole is _____ times the current element.
a) 1/8
b) 1/4
c) 1/2
d) 1/16

7.Which of the following is the radiation resistance of the Hertzian dipole?
a) η0w2dl26πc2
b) η0wdl26πc2
c) η0w2dl23πc2
d) η0w3dl23πc3

8. The radiation resistance of a monopole of height 1cm and operating at frequency 100MHz is ____ Ω.
a) 4.83m
b) 4.38k
c) 4.38m
d) 4.83k

9. Practically we don’t use Hertzian dipole.
a) True
b) False

10. If the radiation resistance of a monopole is 18Ω, then the radiation resistance of a Hertzian dipole is _____________
a) 124Ω
b) 144Ω
c) 164Ω
d) 154Ω

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