NCERT Class 12 MCQ Quiz Hub

MCQ Questions for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance

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1. The dimensions of fall of potential per unit distance are given by:




2. Which of the following is blocked by a capacitor ?




3. Two copper spheres of the same radius, one solid and the other hollow, are charged to the same potential. Which will have more charge?




4. The capacitance of a capacitor will decrease if we introduce a slab of:




5. Two capacitors of capacitance 6 µF and 4 µF are put in series across a 120 V battery. What is the potential difference across the 4 µF capacitor ?




6. In which of the following forms is the energy stored in a capacitor?




7. Two conducting spheres of radii r1 and r2 are equally charged. The ratio of their potential is




8. Twenty seven drops of mercury are charged simultaneously to the same potential of 10 volts. What will be potential if all the charged drops are made to combine to form one large drop ?




9. The P.E. of an electric dipole is maximum when it makes an angle θ with electric field. The value of θ is :




10. The amount of work required to increase the distance between -6µC and 4µC from 6 cm to 18 cm will be :




11. An electron initially at rest is accelerated through a potential difference of one volt. The energy gained by electron is:




12. A bird sitting on a high power line:




13. Choose the SI unit of electric potential energy :




14. The capacitance of earth, viewed as a spherical conductor of radius 6408 km is:




15. A capacitor is connected to a cell of emf E having some internal resistance r, the potential across the:




16. If a +ve charge is moved from low to high potential region, the electric potential energy:




17. IA capacitor is connected across a battery and the plate separation of capacitor is increased without removing the battery, then:




18. Two capacitors of 3 µF and 6 µF are connected in series with a battery of P.d. 12 V. The P.d. across 3µF and 6µF capacitors respectively will be :




19. An electric charge of 425 f µC is removed from a fully charged capacitor of capacitance 8.5µF. Its potential will be lowered by:




20. 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:




21. Minimum number of capacitor of 2µF each required to obtain a capacitance of 5µF will be:




22. 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




23. Choose the vector physical quantity:




24. The surface density of charge is measure:




25. 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?




26. In the above question:




27. nothing can be decided




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




29. 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 ?




30. The electric potential of earth is taken as:




31. A bird sitting on a high power line: