JEE Main 2023 (Online) 8th April Evening Shift | Communication Systems Question 9 | Physics

A TV transmitting antenna is $$98 \mathrm{~m}$$ high and the receiving antenna is at the ground level. If the radius of the earth is $$6400 \mathrm{~km}$$, the surface area covered by the transmitting antenna is approximately:

$$4868 \mathrm{~km}^{2}$$

$$1240 \mathrm{~km}^{2}$$

$$3942 \mathrm{~km}^{2}$$

$$1549 \mathrm{~km}^{2}$$

JEE Main 2023 (Online) 6th April Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

For an amplitude modulated wave the minimum amplitude is $$3 \mathrm{~V}$$, while the modulation index is $$60 \%$$. The maximum amplitude of the modulated wave is:

5 V

12 V

10 V

15 V

JEE Main 2023 (Online) 6th April Morning Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

By what percentage will the transmission range of a TV tower be affected when the height of the tower is increased by $$21 \%$$ ?

12%

15%

10%