Friis Transmission Equation Online Exam Quiz
Friis Transmission Equation GK Quiz. Question and Answers related to Friis Transmission Equation. MCQ (Multiple Choice Questions with answers about Friis Transmission Equation
An ideal source in which the power is radiated equally in all directions is called as __ radiator.
Options
A : Isotropic
B : Omni-directional
C : Directional
D : Transducer
Assume two similar antennas for transmitting and receiving. If the operating frequency gets reduced by 3 times then the received power gets ___
Options
A : increases by factor 3
B : decreases by factor 3
C : increases by factor 9
D : decreases by factor 9
Find the effective length of a receiving antenna with open circuit voltage 1V and incident electric field 200mV/m?
Options
A : 0.2m
B : 50m
C : 5m
D : 5cm
Find the power received by the receiving antenna if it is placed at a distance of 20m from the transmitting antenna which is radiating 50W power at a frequency 900MHz and are made-up of half-wave dipoles.
Options
A : 23.65?W
B : 2.365?W
C : 236.5?W
D : 4.73?W
For an isotropic source, Radiation intensity will be ___ on ? and __ on ?.
Options
A : Dependent, independent
B : Independent, independent
C : Independent, dependent
D : Dependent, dependent
If the distance between the transmitting and receiving antenna is decreased by a factor 2 while other factors remain same, then the new power received by the antenna ___
Options
A : increases by factor 2
B : decreases by factor 2
C : increases by factor 4
D : decreases by factor 4
In Isotropic radiation, which of the following vector component is absent in pointing vector?
Options
A : \widehat{a_r}
B : \widehat{a_\theta}
C : \widehat{a_\emptyset}
D : Both \widehat{a_\theta} and \widehat{a_\emptyset}
Let's assume a transmitting antenna having gain 10dB is placed at a distance of 100m from the receiving antenna and radiates a power of 5W. Find the gain of the receiving antenna in dB when the received power is 150?W and transmitter frequency 500MHz?
Options
A : 1.31dB
B : 1.19dB
C : 11.19dB
D : 13.16dB
Power received by the antenna when one antenna is horizontally polarized and the other is vertically polarized is ___
Options
A : 1
B : 0
C : \frac{P_r}{P_t} = \frac{G_t G_r ?^2}{(4?R)^2}
D : \frac{P_r}{P_t} = \frac{G_t G_r ?^2}{2(4?R)^2}
What is the amount of Electric field present at a distance of 10km for an isotropic radiator with radiating power 3kW?
Options
A : 30mV/m
B : 60mV/m
C : 15mV/m
D : 10mV/m