CBSE  /  Class 12  /  Physics  /  Electrostatic Potential and Capacitance

  • 1. 
    When a dielectric slab is introduced between the plates of a parallel plate capacitor which remains connected to a battery then charge on the plates relative to earlier charge is :

  • more
  • less
  • less or may be more
  • same

  • 2. 
    Choose the vector physical quantity:

  • Electric flux
  • Electric potential
  • Electric potential energy
  • Electric intensity

  • 3. 
    The surface density of charge is measure:

  • Cm-1
  • Cm-2
  • Cm-3
  • JC-1

  • 4. 
    A polythene piece rubbed with wool is found to have a negative charge of 6.4 × 10-9c. How many electrons have been transferred during the process?

  • 4 × 1012
  • 4 × 1011
  • 4 × 1010
  • None of these

  • 5. 
    In the above question:

  • no electrons are transferred
  • electrons are transferred from wool to x polythene
  • electrons are transferred from polythene to wool
  • nothing can be decided

  • 6. 
    In previous question, mass transferred to polythene is:

  • 3.64 × 1020 kg
  • 4 × 10-28 kg
  • 4 × 1010 kg
  • None of these

  • 7. 
    What is the number of electrons in 100 g water?

  • 3.35 × 1024
  • 3.35 × 1025
  • 6.02 × 1023
  • None of these

  • 8. 
    A uniform electric field of 10 NC-1 exists in the vertically downward direction. What is the increase in the electric potential asonegoes up through a height of 300 cm?

  • 15 V
  • 30 V
  • 45V
  • None of these

  • 9. 
    The electric potential of earth is taken as:

  • zero
  • infinity
  • unity
  • None of these

  • 10. 
    A dielectric is placed in between the two parallel plates of a capacitor as shown in the figure. The dielectric constant of the dielectric being K. If the initial capacity is C, then the new capacity will be:
    MCQ Questions for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance with Answers

  • (K + l).C
  • K.C
  • \(\frac{(K+1)}{2}\) C
  • (k - l) C
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