MDCAT Physics Chapter 7 Light Online Test With Answers

MDCAT Physics Chapter 7 Light Online Test

Sr. # Questions Answers Choice
1 The absence of light in the optical fibres represents the number 0 1 2 -1
2 A pulse of light in the optical fibres represents the number 0 1 2 3
3 Which light travels faster in optical fibres? visible light ultraviolet infra-red any one of them
4 The typical wavelength of the signal which we sent in the optical fibre is 1000 nm 100 m 1.3 mn 1.3<i style="box-sizing: border-box; color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 19.8px;">μ</i><span style="box-sizing: border-box; color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 19.8px;">m</span>
5 The light source in the transmitter can be semiconductor laser LED both of them either of them
6 Which of the following converts electrical signals into light signals? optical fibre receiver reflector transmitter
7 A fibre optic communication system consists of one major component two major components three major components four major components
8 In which mode, the refractive index steps down form 1.52 to 1.48 at the boundary with the cladding? Single mode step index multimode step index multimode graded index all of them
9 Which mode can carry more than 14 TV channels or 14000 phone cells? single mod step index multimode step index multimode graded index all of them
10 Which type of fibre is used to send the signals of long distances? single mode step index fibre multimode step index fibre multimode graded index fibre all of them
11 Multi-mode step index fibre index fibre is used to send white light green light a strong monochromatic light yellow light
12 Single mode step index fibre is used to send white light green light a strong monochromatic light yellow light
13 Which optical fibre is used for shorter distances only? single mode step index fibre multi-mode step index fibre multi-mode graded index fibre all of them
14 Which of the following types of optical fibre has a core which rages in diameter from 50 to 1000μm? single mode step fibre multi-mode step index fibre multi-mode graded index fibre none of them
15 Which of the following types of optical fibre has a very thin core of about 5μm diameter and has a relatively large cladding? single mode step index fibre multi-mode step index fibre multi-mode graded index fibre none of them
16 We can divide the optical fibres on the basis of the mode by which they propagate light in two types three types four types many types
17 In which of the optical fibres, the propagation of light signal is through continuous refraction? multi-mode step index fibre multi-mode graded index fibre both of them none of them
18 Which of the following is an optical fibre in which the density of central core decreases towards its periphery? multi-mode step index fibre multi-mode graded index fibre both of them none of them
19 In multi-mode step index optical fibre, that layer is called cladding which has higher refractive index lower refractive index both of them none of them
20 The multi-mode step index optical fibre, the central core has high refractive index and low density low refractive index and density low refractive index and low density high refractive index and high density
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