Physics Mcqs with Answers - Mock MCQs Test

Q1 : In Compton scattering, the change in wavelength is maxed if_______________?

A: The angle of scattering is 90° B: The angle of scattering is 60° C: The angle of scattering is 180° D: The angle of scattering is 0

Q2 : Davison Germer experiment indicates__________________?

A: Interference B: Polarization C: Electron diffraction D: Refraction

Q3 : A photon is________________?

A: A unit of energy B: A positively charged particle C: A quantum of electromagnetic radiation D: A unit of wavelength

Q4 : Which one of the following has the largest energy content ?

A: 103 photons of wavelength 2 pm (γ-rays) B: 102 photons of wavelength 1nm (x-rays) C: 106 photons of wavelength 50?m (infrared) D: 106 photons of wavelength 200nm (UV)

Q5 : A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?

A: λ B: Speed of sound C: Speed of lightB. D: h

Q6 : After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________?

A: Increases because wavelength decreases B: Decreases because speed decreases C: Remains same D: Increases then decrease

Q7 : In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?

A: Becomes double B: Remains same C: Becomes half D: First increases then decrease because of the curvilinear graph

Q8 : If the wavelength of incident radiation is increased in photoemission then_________________?

A: The maximum kinetic energy of the photoelectrons increases B: The minimum kinetic energy of the photoelectrons decreases C: The minimum kinetic energy of the photoelectrons increases D: The average kinetic energy of the photoelectrons decreases

Q9 : If a photon is reflected from the mirror then the change in momentum of each photon is_______________?

A: Zero B: Double C: Half D: 1

Q10 : If n number of the photon is striking on a metal surface then total momentum exerted is_______________?

A: p B: n C: 0 D: None

Q11 : A photon of wavelength 900nm behaves like a particle of mass______________?

A: 5.53 x 10-36kg B: 0 kg. C: 2.46 x 10-36kg D: 1.84 x 10-44kg

Q12 : The velocity of a particle of mass m of de-Broglie wavelength λ is______________?

A: v = 3 ×× 106 ms-1 B: v = 2 ×× 10 ms-1 C: v = 2 ×× 6 ms-1 D: v = 2 ×× 106 ms-1

Q13 : In Davisson-Germer experiment the diffracted proton from crystal shows______________?

A: Particle property B: Wave property C: Light property D: Quantum property

Q14 : If a diffraction grating is placed in the path of a light beam it reveals______________?

A: Wave property B: Particle property C: Energy particle D: Electromagnetic wave property

Q15 : In an electron microscope, we use energetic particles because of______________?

A: Penetrating power is high B: Kinetic energy is large C: Wavelength is very short D: All the above reasons

Q16 : In the electron microscope, electric & magnetic fields are used as_______________?

A: Electromagnetic gun B: Source of electromagnetic waves C: Deflecting charged particle D: Converging source of electrons

Q17 : A three-dimensional image is obtained by________________?

A: Scanning B: electron microscope C: Magnetic imaging D: None of the above

Q18 : The uncertainty in momentum & position is due to its_____________?

A: Property of matter and radiation B: Two-dimensional motion C: Emission of the certain wavelength D: Very high velocity

Q19 : For confinement of electron in a box of radius 10-14m the electron, speed should be_____________?

A: 107m/sec B: Should be greater than the speed of light. C: Be zero D: Not be wave-like

Q20 : The energy radiated is directly proportional to the fourth power of Kelvins temperature is________________?

A: Karl-Weins law B: Rayleigh-Jeans law C: Stephens law D: Plancks

Q21 : Compton effect proves the________________?

A: Photon theory of light B: Dual nature of light C: Wave nature of light D: Uncertain nature of light

Q22 : Electron moves in the orbit as________________?

A: Simple vibratory motion B: Standing wave motion C: Vibratory motion like up and down D: S.H.M likes the sound

Q23 : A lens which converges a beam of parallel rays to a point is called______________?

A: diverging (or concave) lens B: converging (or convex) lens C: plano concave lens D: plano convex lens

Q24 : The diameter of a lens is called________________?

A: focal length B: principal axis C: aperture D: radius of curvature

Q25 : Unit of power of a lens is________________?

A: meter B: watt C: diopter D: horsepower

Q26 : The power of a concave lens is_______________?

A: real B: virtual C: positive D: negative

Q27 : If an object is placed away from 2f of a converging lens then the image will be_______________?

A: real and erect B: virtual and erect C: real and inverted D: virtual

Q28 : Magnifying power of simple microscope______________?

A: increase with increase in focal length B: increase with decrease in focal length C: no effect with decrease or increase with focal length D: list distance of distinct vision

Q29 : The least distance of distinct vision for a normal eye is_______________?

A: 15 cm B: 25 cm C: 30 cm D: 40 cm

Q30 : If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?

A: chromatic aberration B: spherical aberration C: both spherical and chromatic D: distortion

Q31 : A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is_____________?

A: f2 + f1 B: f2 – f1 C: f1f2/f2+f1 D: f1f2/f1-f2

Q32 : In multimode step index fibre the refractive index of core and cladding is____________?

A: same B: different C: zero D: different with refractive index of core higher than cladding

Q33 : Final image produced by a compound microscope is_____________?

A: real and inverted B: real and erect C: virtual and erect D: virtual and inverted

Q34 : For normal adjustment, length of astronomical telescope is______________?

A: fo + fe B: fo – fe C: fo / fe D: fe / fo

Q35 : Two convex lenses of equal focal length f are placed in contact the resultant focal length of the combination is______________?

A: zero B: focus C: 2 f D: f/2

Q36 : Least distance of distinct vision_____________?

A: increases with increase in age B: decreases with increase in age C: neither increases nor decreases D: becomes infinite after 60 years

Q37 : Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is__________________?

A: 0.5 B: 0.2 C: 1 D: 2

Q38 : A convex lens gives a virtual image only when the objects lies_________________?

A: between principal focus and center of curvature B: beyond 2 f C: at the principal focus D: between principal focus and optical center

Q39 : The minimum distance between an object and its real image in a convex lens is_____________?

A: 2 f B: 2.5 f C: 3f D: 4f

Q40 : Dioptre power of an concave lens of 10 cm focal length is_______________?

A: 10 dioptre B: 10 dioptre C: 1 / 10 dioptre D: 1 / 10 dioptre

Q41 : A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?

A: center of curvature B: focus C: optical center D: aperture

Q42 : The value of critical angle for glass is_______________?

A: 42° B: 47° C: 52° D: 50°

Q43 : In optic fiber transmission system _____________ are used regenerate the dim light signal?

A: Diodes B: Repeaters C: Laser D: Transformer

Q44 : Magnification of the astronomical telescope is_____________?

A: fo+fe B: fo/fe C: fe/fo D: (1+fo/fe)L/fo

Q45 : Errors in the transmission of power through optic fiber can be minimized by using a______________?

A: Multimode index fiber B: Graded index fiber C: Single mode step index fiber D: Copper wire

Q46 : The function of collimeter in spectrometer is________________?

A: to produce parallel beams of light B: to filter the light rays C: to make them D: no function

Q47 : In optic fiber transmission the repeater are separated through a distance of __________ km in newer system?

A: 300km B: 200km C: 100km D: 20km

Q48 : Michelson devised the formula to calculate the speed of light_______________?

A: C = 4fd B: C = 8fd C: C = 16fd D: C = 5/2fd

Q49 : A convex lens acts as a diverging lens if the_________________?

A: object is beyond C B: if the object is with in C C: if the object is within f D: both B and C

Q50 : The equation θ = 1.22 λ/D was devised by_______________?

A: Newton B: Einstein C: Raleigh D: Planks

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Physics MCQs with Answers – Free Bio MCQs Test for All Topics

Looking for Physics MCQs with answers? Get topic-wise Bio MCQs tests for NEET, MDCAT, and competitive exams. Practice now and test your knowledge with educatehow.com

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