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Physics Class XII- Electric Charge and Field

Quiz by TEJINDER SINGH

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20 questions
Show answers
  • Q1
    Phenomena in which a charged body attracts uncharged body is called
    electrostatic induction
    electric current
    charge movement
    magnetic induction
    45s
  • Q2
    When a glass rod is rubbed with silk, it
    gives protons to silk
    gives electrons to silk
    gains protons from silk
    gains electrons from silk
    45s
  • Q3
    Two similar spheres having +Q and -Q charges are kept at a certain distance. F force acts between the two. If at the middle of two spheres, another similar sphere having +Q charge is kept, then it experiences a force in magnitude and direction as
    zero having no direction
    4F towards +Q charge
    8F towards -Q charge
    8F towards +Q charge
    45s
  • Q4
    Two charges of equal magnitudes kept at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled, then the new force acting on each charge is
    4F
    F/4
    F/8
    (b) F/16
    45s
  • Q5
    The electric field inside a spherical shell of uniform surface charge density is
    directly proportional to the distance from the centre
    zero
    none of the these
    constant, less than zero
    45s
  • Q6
    When air in between the two charges is replaced by water of dielectric constant 80, their electrostatic force
    Reduced to 1/80th
    None of these
    Becomes 80 times
    Remains unaffected
    45s
  • Q7
    Electric flux due to a dipole of dipole moment 2 Cm placed inside a spherical surface of radius 2 cm (in Nm2/C):
    4
    1
    0
    None of the above
    45s
  • Q8
    A positively charged sphere A is brought close without touching to a neutral sphere B. Sphere B is touched with a grounded wire. What is the charge on sphere B after the wire is removed?
    Negative
    It depends on the contact time
    Positive
    It stays neutral
    45s
  • Q9
    The SI unit of electric flux is
    N C-1 m-2
    NC-1 m 2
    N C m 2
    N C-2 m 2
    45s
  • Q10
    The unit of electric dipole moment is
    faraday
    debye
    newton
    coulomb
    45s
  • Q11
    What is the magnitude of the electric field at point P, midway between the two like charges of same magnitude ?
    3.0 x 104 N/C
    1.0 x 104 N /C
    0 N/C
    2.0 x 104 N/C
    45s
  • Q12
    The force per unit charge is known as
    electric current
    electric flux
    electric field
    electric potential
    45s
  • Q13
    Electric field lines provide information about
    direction
    all of these
    nature of charge
    field strength
    45s
  • Q14
    Electric field originates at __________
    Positive charge
    Neither positive nor negative
    Negative charge
    Both positive and negative
    45s
  • Q15
    In uniform fields, all points have ________ field strength.
    Zero
    Same
    Infinity
    Different
    45s

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