JEE Main 2022 (Online) 25th June Morning Shift | Communication Systems Question 45 | Physics

A baseband signal of 3.5 MHz frequency is modulated with a carrier signal of 3.5 GHz frequency using amplitude modulation method. What should be the minimum size of antenna required to transmit the modulated signal?

42.8 m

42.8 mm

21.4 mm

21.4 m

JEE Main 2021 (Online) 27th August Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

An antenna is mounted on a 400 m tall building. What will be the wavelength of signal that can be radiated effectively by the transmission tower upto a range of 44 km?

37.8 m

605 m

75.6 m

302 m

JEE Main 2021 (Online) 26th August Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

A transmitting antenna at top of a tower has a height of 50 m and the height of receiving antenna is 80 m. What is range of communication for Line of Sight (LoS) mode?

[use radius of earth = 6400 km]

45.5 km

80.2 km

144.1 km

57.28 km

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