JEE Main 2023 (Online) 30th January Morning Shift | Communication Systems Question 18 | Physics

A sinusoidal carrier voltage is amplitude modulated. The resultant amplitude modulated wave has maximum and minimum amplitude of $$120 \mathrm{~V}$$ and $$80 \mathrm{~V}$$ respectively. The amplitude of each sideband is :

15 V

20 V

5 V

10 V

JEE Main 2023 (Online) 29th January Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

The modulation index for an A.M. wave having maximum and minimum peak-to-peak voltages of 14 mV and 6 mV respectively is-

0.4

0.6

1.4

0.2

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

If the height of transmitting and receiving antennas are 80 m each, the maximum line of sight distance will be:

Given : Earth's radius $$=6.4\times10^6$$ m

28 km

64 km

32 km

36 km

JEE Main 2023 (Online) 25th January Evening Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

Match List I with List II

	List I		List II
A.	Troposphere	I.	Approximate 65-75 km over Earth's surface
B.	E-Part of Stratosphere	II.	Approximate 300 km over Earth's surface
C.	F$$_2$$-Part of Thermosphere	III.	Approximate 10 km over Earth's surface
D.	D-Part of Stratosphere	IV.	Approximate 100 km over Earth's surface