Wireless Communication MCQ Questions with Answers - 2

Question: 6

The cladding which surrounds the fibre core

(A) Is used to protect the fibre

(B) Ensures that refractive index remains unaltered

(C) Is used to reduce optical interference

(D) Helps to guide the light in the core

Question: 7

Four main types of telephone exchanges are used in India. The correct order in which they appeared in our country, is

(A) Manual, strowger, cross bar, electronic

(B) Manual, cross bar, strowger, electronic

(C) Manual, electronic, strowger, cross bar

(D) Strowger, manual, electronic, cross bar

Question: 8

Polarization mode dispersion (PMD) is mainly observed in

(A) Plastic fiber

(B) Multimode graded index fiber

(C) Single mode fiber

(D) Multiple step index fiber

Question: 9

What is the numerical aperture of an optical fibre when its critical angle is 30°

(A) 0.2

(B) 0.5

(C) 0.704

(D) 0.866

Question: 10

Light travels along the optical fibres by which mechanism?

(A) Total internal reflection

(B) Reflection

(C) Scattering

(D) Refraction