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1
JEE Main 2022 (Online) 30th June Morning Shift
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-1
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A speech signal given by 11 sin(2200 $$\pi$$t) V is used for amplitude modulation with a carrier signal given by 44 sin(6600 $$\pi$$t) V. The minimum amplitude of modulated wave will be :

A
33 V
B
55 V
C
8.25 V
D
13.75 V
2
JEE Main 2022 (Online) 29th June Evening Shift
MCQ (Single Correct Answer)
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The TV transmission tower at a particular station has a height of 125 m. For doubling the coverage of its range, the height of the tower should be increased by

A
125 m
B
250 m
C
375 m
D
500 m
3
JEE Main 2022 (Online) 29th June Morning Shift
MCQ (Single Correct Answer)
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-1
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Only 2% of the optical source frequency is the available channel bandwidth for an optical communicating system operating at 1000 nm. If an audio signal requires a bandwidth of 8 kHz, how many channels can be accommodated for transmission :

A
375 $$\times$$ 107
B
75 $$\times$$ 107
C
375 $$\times$$ 108
D
75 $$\times$$ 109
4
JEE Main 2022 (Online) 28th June Evening Shift
MCQ (Single Correct Answer)
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-1
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Amplitude modulated wave is represented by $${V_{AM}} = 10\,[1 + 0.4\cos (2\pi \times {10^4}t)]\cos (2\pi \times {10^7}t)$$. The total bandwidth of the amplitude modulated wave is :

A
10 kHz
B
20 MHz
C
20 kHz
D
10 MHz
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