JEE Main 2019 (Online) 12th January Morning Slot | Communication Systems Question 82 | Physics

An amplitude modulated signal is plotted below :

JEE Main 2019 (Online) 11th January Evening Slot Physics - Communication Systems Question 83 English

JEE Main 2019 (Online) 11th January Evening Slot Physics - Communication Systems Question 83 English

Which one of the following best describes the above signal ?

(1 + 9sin (2$$\pi $$ $$ \times $$ 10⁴ t)) sin(2.5$$\pi $$ $$ \times $$ 10⁵t) V

(9 + sin (4$$\pi $$ $$ \times $$ 10⁴ t)) sin(5$$\pi $$ $$ \times $$ 10⁵t) V

(9 + sin (2$$\pi $$ $$ \times $$ 10⁴ t)) sin(2.5$$\pi $$ $$ \times $$ 10⁵t) V

(9 + sin (2.5$$\pi $$ $$ \times $$ 10⁴ t)) sin(2$$\pi $$ $$ \times $$ 10⁴t) V

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

An amplitude modulated signal is given by V(t) = 10[1 + 0.3cos(2.2 $$ \times $$ 10⁴ t)] sin(5.5 $$ \times $$ 10⁵ t). Here t is in seconds. The sideband frequencies (in kHz) are, [Given $$\pi $$ = 22/7]

892.5 and 857.5

89.25 and 85.75

1785 and 1715

178.5 and 171.5

JEE Main 2019 (Online) 10th January Evening Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

The modulation frequency of an AM radio station is 250 kHz, which is 10% of the carrier wave. If another AM station approaches you for license what broadcast frequency will you allot ?

2900 kHz

2750 kHz

2250 kHz

2000 kz

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