Physics · 2023
JEE Main · 13 April 2023, Shift 2 · Q50
To radiate EM signal of wavelength λ with high efficiency, the antennas should have a minimum size equal to:
To radiate EM signal of wavelength $\displaystyle \lambda$ with high efficiency, the antennas should have a minimum size equal to :
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle \frac{\lambda}{4}$
More from Communication Systems
- A message signal of frequency 3 kHz is used to modulate a carrier signal of frequency 1.5 MHz. The bandwidth of the amplitude modulated wave is2023
- Match List I with List II Choose the correct answer from the options given below:2023
- The amplitude of 15 sin (1000 π t) is modulated by 10 sin (4 π t) signal. The amplitude modulated signal contains frequency (ies) of A. 500 Hz B. 2…2023
- Match List I with List II: Choose the correct answer from the options given below:2023
- A message signal of frequency 5 kHz is used to modulate a carrier signal of frequency 2 MHz. The bandwidth for amplitude modulation is:2023
- The height of transmitting antenna is 180 m and the height of the receiving antenna is 245 m. The maximum distance between them for satisfactory…2023
- In satellite communication, the uplink frequency band used is:2023
- For an amplitude modulated wave the minimum amplitude is 3 V, while the modulation index is 60 %. The maximum amplitude of the modulated wave is:2023
JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.