Cbse Class 12 Physics

30 Questions

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Cbse Class 12 Physics

Unlimited attempts possible Overall 500 questions to practice On each attempts you will get 30 questions randomly


Questions and Answers
  • 1. 
    The name electricity is coined from the Greek word __________meaning amber
    • A. 

      Elektron

    • B. 

      Electron

    • C. 

      Electrion

    • D. 

      Elektrion

  • 2. 
    _______________ offer resistance to the movement of charges which is intermediate between the conductors and insulators.
    • A. 

      Dielectric

    • B. 

      Nonconductors

    • C. 

      Semiconductors

    • D. 

      Nonmetals

  • 3. 
    The degree of _____________ is an indicator of the amount of charge.
    • A. 

      Polarity

    • B. 

      Divergence

    • C. 

      Positive charge

    • D. 

      Negative charge

  • 4. 
    Charge,e =
    • A. 

      1.602192 × 10^–9 C

    • B. 

      1.602192 × 10^–19 C

    • C. 

      1.602192 × 10^+19 C

    • D. 

      1.602192 × 10^+9 C

  • 5. 
    Coulomb used a torsion balance. A torsion balance is a sensitive device to measure ________.
    • A. 

      Charge

    • B. 

      Elecricity

    • C. 

      Polarity

    • D. 

      Force

  • 6. 
    The charge q, which tests the effect of a source charge, is called___________
    • A. 

      Postive Charge

    • B. 

      Negative charge

    • C. 

      Auxilary charge

    • D. 

      Test charge

  • 7. 
    Electric field is a --------------field, since force is a------------ quantity
    • A. 

      Vector,Vector

    • B. 

      Scalar,Vector

    • C. 

      Vector,Scaler

    • D. 

      Scalar,Scalar

  • 8. 
    The picture of field lines was invented by Faraday,called---------
    • A. 

      Line of Field

    • B. 

      Line of force

    • C. 

      Line of charge

    • D. 

      Line of falls

  • 9. 
    Two field lines can never cross each other.
    • A. 

      True

    • B. 

      False

  • 10. 
    The field of the electric dipole is--------
    • A. 

      Zero

    • B. 

      Notzero

    • C. 

      Uncertain

    • D. 

      Infinity

  • 11. 
    A plane perpendicular to the dipole axis through its centre.
    • A. 

      S-plane

    • B. 

      Xy plane

    • C. 

      Perpendicular plane

    • D. 

      Equatorial plane

  • 12. 
    The centres of positive charges and of negative charges lie at the same place,their dipole moment is -----------.
    • A. 

      Uncertain

    • B. 

      Zero

    • C. 

      Not zero

    • D. 

      Infinity

  • 13. 
    The volume charge density also called as -----------
    • A. 

      Field density

    • B. 

      Volume density

    • C. 

      Charge density

    • D. 

      Charged density

  • 14. 
    ∆s Denotes---------
    • A. 

      Vector area element

    • B. 

      Electric field

    • C. 

      Electric flux

    • D. 

      Electric charge

  • 15. 
    Linear Charge density is --,surface Charge density is --,volume Charge density is --.
    • A. 

      ρ,λ,σ

    • B. 

      λ,ρ,σ

    • C. 

      λ,σ,ρ

    • D. 

      σ,ρ,λ

  • 16. 
    Coulomb force and gravitational force follow the same ----------
    • A. 

      Square law

    • B. 

      Inverse square law

    • C. 

      Inverse law

    • D. 

      Newton's law

  • 17. 
    Superposition principle,there are ----additional three-body, four-body, etc., forces which arise only when there are more than two charges
    • A. 

      Few

    • B. 

      No

    • C. 

      More

    • D. 

      None of the above

  • 18. 
    "The electric field due to a charge configuration with total charge zero is not zero; but for distances large compared to the size of the configuration, its field falls off faster than 1/r2, typical of field due to a single charge".Give example for above fact.
    • A. 

      Electric charge

    • B. 

      Electirc density

    • C. 

      Electric dipole moment

    • D. 

      Electric dipole

  • 19. 
    In a non-polar molecule, the centres of positive and negative charges coincide.
    • A. 

      FALSE

    • B. 

      TRUE

  • 20. 
    Two large plane parallel conducting plates separated by a small distance.
    • A. 

      Parallel plane capacitors

    • B. 

      Serial plate capacitors

    • C. 

      Parallel plate capacitors

    • D. 

      Serial plane capacitors

  • 21. 
    Which is typically the order of magnitude of currents in domestic appliances?
    • A. 

      Ampere

    • B. 

      Field

    • C. 

      Mobility

    • D. 

      Voltage

  • 22. 
    A gram of water contains approximately 10^22 ------------
    • A. 

      Electrons

    • B. 

      Charged nuclei

    • C. 

      Atom

    • D. 

      Molecules

  • 23. 
    A basic law regarding flow of currents was discovered by------------in 1828, long before the physical mechanism responsible for flow of currentswas discovered.
    • A. 

      Faraday

    • B. 

      G.S. Ohm

    • C. 

      Van de Graff

    • D. 

      Kirchoff

  • 24. 
    I/A, is called --------
    • A. 

      Current intensity

    • B. 

      Magnetic field density

    • C. 

      Current density

    • D. 

      Magnetic field density

  • 25. 
    The collisions of the electrons occur at regular intervals
    • A. 

      False

    • B. 

      True

  • 26. 
    Relaxation time is denoted using---------
    • A. 

      σ

    • B. 

      τ

    • C. 

      λ

    • D. 

      ρ

  • 27. 
    Give an example of a material exhibiting behaviour such as relation between V and I is not unique
    • A. 

      Glass

    • B. 

      Pure water

    • C. 

      NaCl

    • D. 

      GaAs

  • 28. 
    Which exhibit a very weak dependence of resistivity with temperature?
    • A. 

      Nickel

    • B. 

      Pure water

    • C. 

      Nichrome

    • D. 

      Iron

  • 29. 
    State Ohmic loss
    • A. 

      VxI

    • B. 

      I^2 x R

    • C. 

      IV∆t

    • D. 

      IxR

  • 30. 
    Emf is __________
    • A. 

      Electromotive force

    • B. 

      Electromagnetic force

    • C. 

      Electromechnical force

    • D. 

      Electricmechical force