# Normal Mode of Radiation MCQ’s

This set of Antenna Multiple Choice Questions & Answers (MCQs) focuses on “Normal Mode of Radiation”.

1. Which of the following is the condition for the normal mode of radiation?
a) The dimensions of antenna must be smaller compared to the wavelength
b) The dimensions of antenna must be approximately equal to the wavelength
c) The dimensions of antenna must be greater compared to the wavelength
d) The dimensions of antenna must be approximately equal to or greater than the wavelength

2. In which of the following mode of radiation low efficiency and narrow bandwidth is observed?
a) Normal mode
b) Axial mode
c) Conical mode
d) Beam mode

3. In which of the following the radiation of helical antenna is broadside?
a) Normal mode
b) Axial mode
c) Conical mode
d) Beam mode

4. In normal mode of radiation, far field pattern is independent of number of turns in helical antenna.
a) True
b) False

5. Normal mode of radiation is limited in use because _____
a) it has narrow bandwidth and dependency on small dimensions of the antenna compared to wavelength
b) it has broad bandwidth and independent of antenna dimensions
c) it has narrow bandwidth and is independent of antenna dimensions
d) it has broad bandwidth and dependency on large dimensions of the antenna compared to wavelength

6. For a helical antenna radiation, the pitch angleα should be _____
a) 0 < α < 90
b) α=0
c) α=90
d) α=0 or 90

7. Which of the following is false regarding normal mode of radiation of helical antenna?
a) The dimensions of the antenna are small compared to the wavelength
b) The far field pattern is independent of the number of turns
c) The current is assumed to vary along the length of the antenna
d) The radiation is normal to the direction of the axis

8. In normal mode, the radiation is directed along ______
b) end-fire
c) along the axis
d) in all directions

9. Which of the following is true about normal mode of radiation?
a) The dimensions of the antenna are small compared to the wavelength
b) The radiation is along the axis of the antenna
c) It has high radiation efficiency

10. In normal mode of operation, the radiation is along the end-fire direction.
a) True
b) False 5 Star
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