Optical Communication MCQ Questions & Answers

Optical Communication MCQ Questions & Answers | ECE

Learn Optical Communication MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Optical Communication MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-6 section-2

In an opto-electronic communication system, the system component in which free electrons are involved in its operation is

A) Laser B) Optical fibre C) Photo detector D) Coupling device employed with the optical fibre

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Answer & Solution

Answer: Option C

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Match List-I wish List-II and select the correct answer the correct answer using the options given below:

List-I (System)	List-II (Order of wavelength)
a. Optical fiber communication	1. 10⁴ m
b. Local television system	2. 10² m
c. FM broadcasting	3. 10° m
d. Satellite	4. 10^-2 m
	5. 10^-6 m

A) a-5, b-3, c-3, d-4 B) a-1, b-3, c-4, d-5 C) a-2, b-2, c-3, d-5 D) a-1, b-2, c-5, d-4

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Answer: Option A

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In the SONET, form the Synchronous Transport Signal (STS), Optional Carrier (OC) is obtained

A) after scrambling and optical electrical conversion B) after electrical to optical conversion C) after optical to electrical conversion D) after scrambling and electrical to optical conversion

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Answer: Option D

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A fibre-optic cable has the indices of refraction of core of 1.6 and of cladding of 1.4, For an angle of incidence 70°, the angle of return light ray will be

A) 3.5° B) 61° C) 70° D) 90°

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Answer: Option C

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What type of wiring does ISDN use?

A) Coaxial cable B) Twisted pair C) Solenoid D) Thin wire

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Answer: Option B

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A single-mode optical fiber has a beat length of 8 cm at 1300 nm. The value of birefringence B_f will be nearly

A) 1.6 × 10^-5 B) 2.7 × 10^-5 C) 3.2 × 10^-5 D) 4.9 × 10^-5

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Answer: Option A

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The local loop is

A) An antenna used for telephone communications B) The connection between telephone subscriber and central office C) A cell site D) A ring network used to connect users to the telephone office

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Answer: Option B

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Assuming no ISI, the maximum possible bandwidth of a multimode graded index fiber with 5 MHz, shows the total pulse broadening of 0.1s for the distance of about 12 km. What would be the value of bandwidth length product?

A) 40 MHz B) 60 MHz C) 90 MHz D) 120 MHz

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Answer: Option B

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An optical fibre has refractive index core

A) high and low refractive index cladding B) low and high refractive index cladding C) uniform surrounded by variable index cladding D) variable with refractive index increases from low at the centre to high at the junction with cladding

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Answer: Option A

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The response time of photodiode depends on

A) Diffusion time of photo carriers outside the depletion region B) Diffusion time of photo carriers within the depletion region C) RC time constant D) All of the above

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Answer: Option D

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