This chapter is currently out of syllabus
1
JEE Main 2023 (Online) 8th April Evening Shift
+4
-1
Out of Syllabus

The power radiated from a linear antenna of length $$l$$ is proportional to

(Given, $$\lambda=$$ Wavelength of wave):

A
$$\left(\frac{l}{\lambda}\right)^{2}$$
B
$$\frac{l}{\lambda^{2}}$$
C
$$\frac{l^{2}}{\lambda}$$
D
$$\frac{l}{\lambda}$$
2
JEE Main 2023 (Online) 8th April Morning Shift
+4
-1
Out of Syllabus

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:

A
$$4868 \mathrm{~km}^{2}$$
B
$$1240 \mathrm{~km}^{2}$$
C
$$3942 \mathrm{~km}^{2}$$
D
$$1549 \mathrm{~km}^{2}$$
3
JEE Main 2023 (Online) 6th April Evening Shift
+4
-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:

A
5 V
B
12 V
C
10 V
D
15 V
4
JEE Main 2023 (Online) 6th April Morning Shift
+4
-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 $$21 \%$$ ?

A
12%
B
15%
C
10%
D
14%
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