This chapter is currently out of syllabus

1

JEE Main 2023 (Online) 15th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

The height of transmitting antenna is $180 \mathrm{~m}$ and the height of the receiving antenna is $245 \mathrm{~m}$. The maximum distance between them for satisfactory communication in line of sight will be :

(given $\mathrm{R}=6400 \mathrm{~km})$

(given $\mathrm{R}=6400 \mathrm{~km})$

2

JEE Main 2023 (Online) 13th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

To radiate EM signal of wavelength $$\lambda$$ with high efficiency, the antennas should have a minimum size equal to:

3

JEE Main 2023 (Online) 13th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Match List - I with List - II

List - I (Layer of atmosphere) |
List - II (Approximate height over earth's surface) |
||
---|---|---|---|

(A) | $$\mathrm{F_1}$$ - Layer | (I) | 10 km |

(B) | $$\mathrm{D}$$ - Layer | (II) | 170 - 190 km |

(C) | Troposphere | (III) | 100 km |

(D) | $$\mathrm{E}$$ - Layer | (IV) | 65 - 75 km |

Choose the correct answer from the options given below:

4

JEE Main 2023 (Online) 12th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

The amplitude of $$15 \sin (1000 \pi \mathrm{t})$$ is modulated by $$10 \sin (4 \pi \mathrm{t})$$ signal. The amplitude modulated signal contains frequencies of

A. $$500 \mathrm{~Hz}$$

B. $$2 \mathrm{~Hz}$$

C. $$250 \mathrm{~Hz}$$

D. $$498 \mathrm{~Hz}$$

E. $$502 \mathrm{~Hz}$$

Choose the correct answer from the options given below:

Questions Asked from Communication Systems (MCQ (Single Correct Answer))

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