MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Antenna Parameters knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Assume two similar antennas for transmitting and receiving. If the operating frequency gets reduced by 3 times then the received power gets _______ |
| A. | increases by factor 3 |
| B. | decreases by factor 3 |
| C. | increases by factor 9 |
| D. | decreases by factor 9 |
| Answer» D. decreases by factor 9 | |
| 2. |
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 _______ |
| A. | increases by factor 2 |
| B. | decreases by factor 2 |
| C. | increases by factor 4 |
| D. | decreases by factor 4 |
| Answer» D. decreases by factor 4 | |
| 3. |
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? |
| A. | 1.31dB |
| B. | 1.19dB |
| C. | 11.19dB |
| D. | 13.16dB |
| Answer» D. 13.16dB | |
| 4. |
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. |
| A. | 23.65 W |
| B. | 2.365 W |
| C. | 236.5 W |
| D. | 4.73 W |
| Answer» D. 4.73 W | |
| 5. |
Power received by the antenna when one antenna is horizontally polarized and the other is vertically polarized is _______ |
| 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} ) |
| Answer» C. ( frac{P_r}{P_t} = frac{G_t G_r ^2}{(4 R)^2} ) | |
| 6. |
If the operating frequency increases, powers received by the receiving antenna ______ |
| A. | will decrease |
| B. | will Increase |
| C. | is Independent of frequency |
| D. | is not predictable |
| Answer» B. will Increase | |
| 7. |
Which of the following is the Friss transmission equation for the matched polarization of antennas? |
| A. | ( frac{P_r}{P_t} = frac{G_t G_r lambda^2}{(4 R)^2} ) |
| B. | ( frac{P_t}{P_r} = frac{G_t G_r lambda^2}{(4 R)^2} ) |
| C. | ( frac{P_r}{P_t} = frac{G_t G_r lambda^2}{4 R^2} ) |
| D. | ( frac{P_t}{P_r} = frac{G_t G_r lambda^2}{4 R^2} ) |
| Answer» B. ( frac{P_t}{P_r} = frac{G_t G_r lambda^2}{(4 R)^2} ) | |
| 8. |
Free space loss factor is given by _____ |
| A. | ( frac{ lambda}{4 pi R} ) |
| B. | (( frac{ lambda}{4 pi R})^2 ) |
| C. | ( frac{4 pi R}{ lambda} ) |
| D. | (( frac{4 pi R}{ lambda})^2 ) |
| Answer» C. ( frac{4 pi R}{ lambda} ) | |
| 9. |
What is the distance between antennas to apply the Friss transmission equation in terms of antennas largest dimension? |
| A. | R 2D<sup>2</sup>/ |
| B. | R 2D<sup>2</sup>/ |
| C. | R 2 <sup>2</sup>/D |
| D. | R 2 <sup>2</sup>/D |
| Answer» B. R 2D<sup>2</sup>/ | |
| 10. |
Friss transmission is applicable when same antenna is used for both transmission and reception. |
| A. | True |
| B. | False |
| Answer» C. | |