Physics Mcqs with Answers - Mock MCQs Test

Q1 : Michelson calculated the speed of light using the instruments______________?

A: spectrometer B: galvanometer C: interferometer D: none of these

Q2 : Ratio of the weight of H-atom to that of an electron is approximately______________?

A: 18.336 B: 1836 C: 18360 D: 183.6

Q3 : In hydrogen spectrum which one of the following series lies in the ultraviolet region ?

A: Balmer series B: Pfund series C: Bracket series D: Lymann series

Q4 : Excited atoms return to their ground state in_______________?

A: 10-10s B: 10-8s C: 10-6s D: 10-9s

Q5 : Excited atoms return to their ground state in_______________?

A: 10-10s B: 10-8s C: 10-6s D: 10-9s

Q6 : Hydrogen atom does not emit X-rays because _________________?

A: its energy levels are too close to each other B: its energy levels are too far apart C: it is too small in size D: it is too small in size

Q7 : X-ray are________________?

A: of unknown nature B: high energy electrons C: high energy photons D: radio isotopes

Q8 : Total number of series in hydrogen spectrum is_____________?

A: three B: four C: five D: six

Q9 : The radiations emitted form hydrogen filled discharge tube show____________?

A: band spectrum B: line spectrum C: continuous spectrum D: absorption spectrum

Q10 : Photon of highest frequency will be absorbed when transition takes place from_____________?

A: 1st to 5th orbit B: 2nd to 5th orbit C: 3rd to 5th orbit D: 4th to 5th orbit

Q11 : In obtaining an X-ray photograph of our hand we use the principle of______________?

A: photo electric effect B: ionization C: shadow photograph D: any of above

Q12 : In obtaining an X-ray photograph of our hand we use the principle of______________?

A: photo electric effect B: ionization C: shadow photograph D: any of above

Q13 : When we excite some atoms by heat collision or electrical discharge they will________________?

A: radiate electromagnetic energy with a continuous distribution of wavelength B: absorb particular wavelengths when white light is incident on them C: radiate electromagnetic energy of discrete characteristic wavelength D: emit either invisible or visible light

Q14 : Which one of following postulate is in accordance with the Rutherfords model ?

A: continuous spectra for atoms B: discrete spectra for atoms C: either continuous nor discrete D: no spectrum

Q15 : Ground state energy of the 4th orbit in a H-atom is_____________?

A: 13.60 eV B: 3.40 eV C: 0.85 eV D: 1.51 eV

Q16 : The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?

A: Ke2/rn B: Ke2/rn C: ÀKe2/rn D: ÀKe2/rn2

Q17 : Bracket series is obtained when all transition of electron terminate on_______________?

A: 4th orbit B: 5th orbit C: 3rd orbit D: 2nd orbit

Q18 : The penetrating power of X-rays depends on their______________?

A: applied voltage B: frequency C: source D: all of the above

Q19 : Reverse process of photoelectric effect is_______________?

A: pair production B: Compton effect C: annihilation of matter D: X-rays production

Q20 : Radiation with wavelength longer than red lights______________?

A: ultraviolet rays B: X-rays C: infra red radiation D: visible radiation

Q21 : In an electronic transition atom cannot emit______________?

A: γ-rays B: Infra red radiation C: Visible light D: Ultraviolet rays

Q22 : X-rays are similar in nature to_______________?

A: Cathode rays B: Positive rays C: γ-rays D: Beta rays

Q23 : When X-rays are passed through successive aluminum sheets what happens to their thickness ?

A: increases B: it decreases C: it remains same D: sometimes increases and sometimes decreases

Q24 : Quality of X-rays depends upon ____________ A-filament current B-accelerating voltage C-material of the target ?

A: A & B B: B & C C: A & C D: A B & C

Q25 : In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?

A: he/ev B: he/Vc C: eV/h D: impossible to predict

Q26 : Radiation produced from TV picture tube is_____________?

A: B-rays B: X-rays C: Far infrared D: Infrared

Q27 : The minimum wavelength of X-rays can further be reduced by _______________?

A: Reducing the pressure or cooling the target B: Increasing the temperature of the filament. C: Using a target element of higher atomic number D: Increasing the potential difference between the cathode and the target

Q28 : The characteristic X-rays spectrum is due to_____________?

A: The illumination of the target metal by ultra-violet radiation B: The bombardment of the target by protons C: The bombardment of target by electrons D: The absorption of radiation by the target metal

Q29 : The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the accelerating potential is 2.0K V will be______________?

A: 6.2 x 10-10m B: 9.1 x 10-18m C: 3.11 x 10-10m D: 4 x 10-10m

Q30 : Maximum frequency in the spectrum from X-ray tube is directly proportional to the______________?

A: Number of incident electron i.e. filament current B: The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated C: The soft target which can easily emit electrons D: All of above are correct

Q31 : X-rays are diffracted by a crystal but not by a diffraction grating because_____________?

A: The ions in a crystal are well arranged B: The lines in a diffraction grating cannot reflect X-rays. C: The penetration power of X-rays is high in a diffraction grating D: The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal

Q32 : UV radiation can be produced by______________?

A: Heating the filament B: Electron excitation in the gas C: Ionization of atoms D: All the above

Q33 : Wave-like characteristic of electron is demonstrated by______________?

A: Line spectrum of atoms B: Production of x-rays. C: Diffraction by crystalline solids D: Photoelectric effect

Q34 : Electron cannot exist in the nucleus it is confirmed by observing that______________?

A: It does emit radiation B: Its size as compare to proton and neutron is very small C: No antiparticle of electron is present D: The velocity of electron must be very high according to uncertainty principle

Q35 : In normal state of energy the incident high energy photons will be______________?

A: Stimulated B: Absorbed C: Cause X-ray emission D: Cause laser production

Q36 : In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?

A: Metal stable state B: Normal state C: Inverted population D: All the above

Q37 : The metastable state for an atom in laser light is_____________?

A: 10-4 sec B: 10-5 sec C: 10-3 sec D: 10-8 sec

Q38 : In He-Ne laser the lasing action is produced by_______________?

A: Ne only B: He-Ne both C: Electrons of He D: Electrons Ne

Q39 : Reflecting mirrors in laser is used to______________?

A: Further stimulation B: Lasing more C: For producing more energetic lasers D: All

Q40 : The velocity of laser light is___________________?

A: Less than ordinary light B: More than ordinary light C: Equal to ordinary light D: Different for different colours or frequency

Q41 : Electrons present in p-type material due to thermal pair generation are_____________?

A: majority carriers B: minority carriers C: dual carriers D: blockers

Q42 : Semi-conductor germanium and silicon are_________________?

A: pentavalent B: trivalent C: divalent D: tetravalent

Q43 : p-n junction when reversed biased acts as a_______________?

A: capacitor B: inductor C: on switch D: off switch

Q44 : In n-p-n transistor, p works as______________?

A: collector B: emitter C: base D: any of above

Q45 : Identify the correct statement about minority carriers_____________?

A: holes in n-type and free electrons in p-type B: holes in n-type and p-type C: free electrons in n-type and holes in p-type D: free electrons in n-type and p-type

Q46 : The velocity of an oscillating charge as it moves to and fro along a wire is always_____________?

A: constant B: zero C: changing D: infinite

Q47 : Which one of the following has the greatest energy gap ?

A: insulator B: conductor C: semi conductor D: any of above

Q48 : Thermions are________________?

A: protons B: positrons C: electrons D: photons

Q49 : In the transistor schematic symbol, the arrow_______________?

A: is located on the emitter B: is located on the base C: is locate on the collector D: points form north to south

Q50 : The semiconductor diode can be used as a rectifier because _______________?

A: It has low resistance to the current flow when forward biased & high resistance when reverse biased. B: It has low resistance to the current flow when forward biased. C: It has high resistance to the current flow when reverse biased D: Its conductivity increases with rise of temperature.

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

LAT Test

GAT Test

Contact Info

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

Subscribe our Newsletter

LAT Test

GAT Test

Contact Info