MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 The minimum number of lenses used in compound microscope is 1 2 3 4
2 The transmitter in optical fiber system contains a device called LED Diode Transistor None of these
3 Analyzer is use to Polarize the light Un-polarize the light Check whether the light is polarized or un polarized Rotate the plane of polarized light
4 For total internal reflection to take place, the angle of incidence must be ______ than critical angle and the light should travel from ______ to ______ medium Greater, rarer, denser Smaller, rarer, denser Smaller, denser, rarer Greater, denser, rarer
5 The variation if focal length of a lens when we pass from the central portion out words (to words the lens edges) is known as Astigmatism Chromatic Spherical aberration Coma
6 Which of the following light move faster in water Red Violet Green Blue
7 An optical fiber of ______ cm in diameter id equivalent to 7.62 cm diameter bundle of ______ wires to carry the same amount of signals 0.6, aluminum 6.0, copper 0.6, copper 6.0, aluminum
8 The fiber of which refractive index ______ gradually as move from central core to its periphery is called ______ index fiber Decreases, multi-mode graded Increases, single mode step Either of A or B Increases, multi-mode step
9 Cladding means a layer of ______ refractive index over the central core of ______ refractive index Lower, lower Higher, lower Lower, higher None of these
10 A fiber of 50μm diameter capable of carrying white light at ______ distances is called ______ index fiber Large, multi-mode step Small, multi-mode step Small, multi-mode graded Large, single mode step
11 Propagation of light in an optical fiber requires that light should be Refracted from air to fiber Continuously refraction Totally reflected within the fiber Both B and C
12 If we know the refractive index of glass, speed v of light in the glass can be found by v = c n v = c/n v = n/c None of these
13 Which type of optical fiber has the largest diameter Single mode step index fiber Multi-mode step index fiber Multi-mode graded index fiber None of these
14 Let a ray of light enters from air into two media of different refractive indices. The speed of light will be ______ to refractive index Directly proportional Inversely proportional Sometimes inversely Equal
15 The property of light which makes light possible to be transmitted into inaccessible place is Interference Diffraction Polarization None of these
16 The laser light used in an optical fiber system has a wavelength equal to 3<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>μ</i></span>m 5<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>μ</i></span>m 1.3<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>μ</i></span>m 6<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>μ</i></span>m
17 For glass-air boundary, the value of the critical angle is 42° 45° 30° 60°
18 The light waves and radio waves differ in Speed Frequency Wavelength Both B and C
19
20 A material having high refractive index has Low density High density Zero density None of these
21 Cladding in an optical fiber is used to Absorb unneccessary light Produce total internal reflection Transmit light Filter light
22 The ability of an instrument of reveal the minor details of an object under examination is called Resolution Magnification Resolving power Dispersion
23 The resolving power of a grating spectrometer is
24 In case of reflection of ray within a denser medium, angle of incidnet is ______ -angle of reflection Greater then Smaller then Equal to None of these
25 A ray of light passing from a rarer to a denser medium Bends towards normal Bends away from normal Suffers no change in direction None of these
26 For which color of light the refractive index of glass is larger Red Green Blue Violet
27 A shortsighted person can see clearly Near objects Far objects Objects at 25 cm Objects at infinity
28 To get higher magnification we must use Simple microscope A convex lens A compound microscope All of these
29 The speed of light in a medium depends upon Its wavelength Its frequency Refractive index All of these
30 The magnification is negative for Real image Virtual image Sometimes for real sometimes for real Only for cancave lens
31 The magnifying power of a compound microscope can be increased if we use objective lens of Large focal length Small focal length Same focal length None of these
32 The limit of which a microscope can be used to resolve details of an object, demands Wider objective and light of short wavelength Narrow objective and light of short wavelength Narrow objective and light of longer wavelength None of these
33 A lens of 2 cm focal length is to be used as a magnifying glass. Its magnification is 13.5 12.5 0.5 2.5
34 In the formulaαamino = 1.22λ/D, D denotes Distance between source and the object Diameter of lens Power of the lens in Diopters None of these
35 A grating with high resolving power can distinguish ______ difference in ______ Smaller, amplitude Greater, wavelength Smaller, wavelength Greater, intensity
36 The angle of incidence at which angle of refraction becomes 900 is called Incident angle Angle of refraction Critical angle Phase angle
37 The image of an object 5 mm length is only 1 cm high. The magnification of the lens is 1 0.2 2 0.1
38 When the same object is viewed at a shorter distance the image on the retina of eye is ______ and so the object appears ______ Greater, small Smaller, smaller Smaller, larger Greater, larger
39 The refractive index of a medium is defined as a ratio
40 Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be 6 x 10<sup>-5</sup>rad 7 x 10<sup>-5</sup>rad<sup></sup> 8 x 10<sup>-5</sup>rad None of these
Download This Set

Is this page helpful?