2nd year Physics Important MCQS with Answer

2nd year Physics Important MCQs with Answer

2nd year Physics Important MCQs

  1. The number of electrons in one coulomb charge is equal to

    2. a) 6.2×1018 Eloctrons
    b) Zero Electorns
    c) 1.6×10-22 Electorns
    d) 6.2×1021 Electorns

    a)6.2×1018 Eloctrons

  2. The photo copying process is called

    3. a) Xerography
    b) Inkjet Printer
    c) printing
    d) photoediting

    a) Xerography

  3. Electric intensity due to an infinite sheet of charge is

    4. a) ∂/2ε∘
    b) ∂/rε∘
    c) ∂/r2ε∘
    d) none of these

    c) ∂/r2ε∘

  4. Electric flux is a:

    5. a) Scalar quantity
    b) Vector quantity
    c) Vector quantity
    d) All of these

    a) Scalar quantity

  5. Electric potential at a distance ”r” from ”q” is

    6. a) Vr= 1/54πε∘q/r2
    b) Vr= 1/4πεo2q/r2
    c) Vr= 1/4πεo2q/r d) Vr= 1/4πεoq2/r

    c) Vr= 1/4πεo2q/r

  6. The relative permitivity of air is

    7. a) 79.9
    b) 1.006
    c) 1.06
    d) 1.0006

    c) 1.06

  7. The “toner” of photocopier is given:

    8. a) Positive charge
    b) Negative charge
    c) Remains neutral
    d) All of above

    b) Negative charge

  8. The electric intensity at infinite distance from the point charge is

    9. a) infinte
    b) zero
    c) Positive
    d) Negative

    b) zero

  9. Who introduced the concept of electric field

    10. a) Coulomb
    b) Newton
    c) Faraday
    d) Millikan

    c) Faraday

  10. Net charge enclosed by Gaussian surface is:

    11. a) zero
    b) maximum
    c) depend on intensity
    d) Depend upon size of shape

    a) zero

  11. Maximum power output is

    12. a) I2R
    b) VI
    c) E/2R
    d) E2 /4r

    d) E2 /4r

  12. The algebraic sum of potential changes for a closed loop is

    13. a) Kirchhoff’s 1st law
    b) Kirchhoff’s 2nd law
    c) Joule’s Law
    d) Fleming’s Rule

    b) Kirchhoff’s 2nd law

  13. Internal resistance is the resistance offered by

    14. a) Source of emf
    b) The conductor
    c) The resister
    d) The Circuit

    a) Source of emf

  14. The wire of resistance 3.0 Ω is stretched to twice its original length. The resistance of the new wire will be

    15. a) 1.5 Ω
    b) 6.0 Ω
    c) 12 Ω
    d) 3.0 Ω

    b) 6.0 Ω

  15. Electrolytes conduct charges due to

    16. a) protons
    b) electrons
    c) holes
    d) ions

    d) ions

  16. The unit of electromotive force is

    17. a) Newton
    b) Pascal
    c) Ampere
    d) Volt

    d) Volt

  17. Drift velocity of electrons is

    18. a) 10-1m/s
    b) 10-2m/s
    c) m-3/s
    d) m-4/s

    c) m-3/s

  18. Which of the following is non Ohmic device

    19. a) Inductor
    b) Diode
    c) Capacitor
    d) None of these

    b) Diode

  19. Specific resistance of materials depend upon

    20. a) Length
    b) Area
    c) Density
    d) Temperature

    d) Temperature

  20. For a closed circuit

    21. a) E = Vt
    b) E > Vt
    c) E = Vt-Ir

    b) E > Vt

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