JEE Main 2023 (Online) 6th April Evening Shift | Communication Systems Question 11 | Physics

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%

14%

JEE Main 2023 (Online) 1st February Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

In an amplitude modulation, a modulating signal having amplitude of X Volt is superimposed with a carrier signal of amplitude Y Volt in first case. Then, in second case, the same modulating signal is superimposed with different carrier signal of amplitude 2Y Volt. The ratio of modulation index in the two cases respectively will be :

2 : 1

1 : 1

4 : 1

1 : 2

JEE Main 2023 (Online) 1st February Morning Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

Which of the following frequencies does not belong to FM broadcast ?

$$106 ~\mathrm{MHz}$$

$$89 ~\mathrm{MHz}$$

$$64 ~\mathrm{MHz}$$