MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 For single slit diffraction the first minimum occurs when dsinθ =&nbsp;<span style="color: rgb(0, 0, 0); font-family: Georgia; font-size: 18px; line-height: 23.390625px;">λ</span> dsinθ =&nbsp;<span style="color: rgb(0, 0, 0); font-family: Georgia; font-size: 18px; line-height: 23.390625px;">λ</span>/2 dsinθ = 2<span style="color: rgb(0, 0, 0); font-family: Georgia; font-size: 18px; line-height: 23.390625px;">λ</span> dsinθ = m<span style="color: rgb(0, 0, 0); font-family: Georgia; font-size: 18px; line-height: 23.390625px;">λ</span>
2 In Young s experiment the distance between two adjacent fringes for blue light is than that for green light Lesser Greater Equal Lesser if distance between source and screen is large
3 In electromagnetic waves electric and magnetic field ar Parallel Antiparallel Perpendicular Sometimes parallel sometimes perpendicular
4 The ratio of fringes with for bright and dark fringes is 1 : 2 2 : 1 1 : 4 1 : 1
5 An oil film floating on water surface show colours due to Interference Diffraction Scattering Reflection
6 A normal to the waves front showing direction of propagating of wave is called Photon Particle Ray Line
7 In Young s double slit experiment if we use white light then Colored fringes will be observed Bright fringes will be observed Alternate dark and bright fringes will be observed No interference fringes will be seen
8 Which one of the following is nearly monochromatic Light from candle Light from simple lamp Light from sodium lamp Light from sun
9 Polaroid glass is used in sun glasses because It is fashionable It has good color It is cheaper It reduces the light intensity to half on account of polarization
10 The phenomenon of diffraction can be exhibited by Polarized waves only Un polarized waves only Longitudinal waves only All polarized or un polarized waves and longitudinal or transverse waves
11 To observe diffraction phenomenon the size of a obstacle Should be much larger than the wavelength Should be of the same order as the wavelength Have no relation of wavelength Should be exactly&nbsp;<span style="color: rgb(0, 0, 0); font-family: Georgia; font-size: 18px; line-height: 23.390625px;">λ/2</span>
12 If Young s double slit experiment is immersed in water then the fringes with Decreases Remains unchanged Becomes infinite Increases
13 The focal length of the lens of human eye Is fixed Varies from zero to infinity Can be increased only Can be decreased only
14 When interference of light takes place Energy is created in the region of maximum intensity Energy is destroyed in region of maximum intensity Conservation of energy hold goods and energy is redistributed Conservation of energy does not hold good
15 The colour of light is determined by is Wavelength Frequency Velocity Amplitude
16 Critical angle of light passing from glass to air is minimum for Red Green Yellow Violet
17 A completely transparent material will be invisible in vacuum when the refractive index n is Unity More than unity Less than unity Equal to 1.33
18 Mirage is a phenomenon due to Reflection of light Refraction of light Total internal reflection of light Diffraction of light
19 For incident angles equal or greater than the critical angle the glass air boundary will act as a Convex mirror Concave mirror Mirror None if them
20 The danger signals are red while the eye is more sensitive to yellow because Scattering in yellow colour is less than that of red Red light is longer in wavelength than yellow light Scattering in red is less than that of in yellow Red colour has greater frequency than yellow light
21 A driver in a lake wants to signal his distress to a person sitting on the edge of the lake flashing his water proof torch He should direct the beam Vertically up wards Horizontally At angle to the vertical which is slightly less than the critical angle At an angle to the vertical which is slightly more than critical angle
22 Diffraction of X-ray by crystals show that The intensity of X-rays X-rays have very short wavelength X-rays are electromagnetic waves A-rays are just like visible light
23 In Michelson interferometer if the moveable mirror is moved through a distance of 8λ then the number of fringes shifted are 4 8 16 32
24 How many fringes will pass a reference point if the moveable mirror of a Michelson s interferometer is moved 0.06 mm The wavelength of light used is 5.89 x10-3 mm 200 300 20.4 2.3
25 Polaroids are used in Sun glasses The production and analysis of plane polarized light Stereoscopic motion picture All of these
26 Which of the following is an optically active material Solution of cane sugar Liquid nitrogen Mercury Polaroid
27 Wavelength of a laser beam can be used as a standard of Time Angle Length Temperature
28 A beam of light of wavelength is incident normally on a grating of element d the angle between the zero-order and first -order spectra depends on <span style="color: rgb(0, 0, 0); font-family: Georgia; font-size: 18px; line-height: 23.390625px;">λ&nbsp;</span>only d only <span style="color: rgb(0, 0, 0); font-family: Georgia; font-size: 18px; line-height: 23.390625px;">λ&nbsp;</span>and d <span style="color: rgb(0, 0, 0); font-family: Georgia; font-size: 18px; line-height: 23.390625px;">λ&nbsp;</span>d and distance of screen from the grating
29 In a diffraction fringes pattern the fringes are Equally spaced Wider near the centre and narrower away from it Narrower near the centre and&nbsp;Wider&nbsp;away from it None of these
30 Colour of thin film will not show result from Scattering of light Dispersion of light Interference of light Both a and b
31 In Young s double slit experiment the separation between the slits in halved and the distance between the slits and the screen is doubled the fringe with will Be doubled Be quadrupled Remain the same Be halved
32 In an interference fringes pattern the fringes are Equally spaced Wider near the centre and narrower away from it Narrower near the centre and wider away from it None of these
33 If a point source of light is placed at the focus of a convex lens the rays coming out of the lens will constitute Plane wave fronts Cylindrical wave fronts Spherical wave fronts All of above
34 Longitudinal waves do not exhibit Refraction Reflection Diffraction Polarization
35 The wave nature of light was proposed by Einstein Maxwell Huygen Newton
36 Two sources of waves are called coherent if Both have the same amplitude of vibrations Both produce waves of the same wavelength Both produce waves of the same wavelength having a constant phase difference Both produce waves having the same velocity
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