Q. The dimensions of fall of potential per unit distance are given by:
✅ Correct Answer: (C)
[ML2T-2A-3]
Electrostatic Potential and Capacitance MCQs with answers
Dear candidates you will find MCQ questions of 12th Class - Physics | Chapter: Electrostatic Potential and Capacitance here. Learn these questions and prepare yourself for coming examinations. You can check the right answer of any question by clicking the option or by clicking view answer button.
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Q. Two copper spheres of the same radius, one solid and the other hollow, are charged to the same potential. Which will have more charge?
✅ Correct Answer: (C)
Both will have an equal charge
Q. The capacitance of a capacitor will decrease if we introduce a slab of:
✅ Correct Answer: (D)
None of these
Q. 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 ?
✅ Correct Answer: (A)
72 V
Q. In which of the following forms is the energy stored in a capacitor?
✅ Correct Answer: (D)
Electric field
Q. Two conducting spheres of radii r1 and r2 are equally charged. The ratio of their potential is
✅ Correct Answer: (B)
(r1r2)²
Q. 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 ?
✅ Correct Answer: (B)
90 V
Q. The amount of work required to increase the distance between -6µC and 4µC from 6 cm to 18 cm will be :
✅ Correct Answer: (B)
2.4 J
Q. An electron initially at rest is accelerated through a potential difference of one volt. The energy gained by electron is:
✅ Correct Answer: (B)
1.6 × 10-19 J
Q. The capacitance of earth, viewed as a spherical conductor of radius 6408 km is:
✅ Correct Answer: (B)
712 µF
Q. A capacitor is connected to a cell of emf E having some internal resistance r, the potential across the:
✅ Correct Answer: (B)
cell is E
Q. If a +ve charge is moved from low to high potential region,
the electric potential energy:
the electric potential energy:
✅ Correct Answer: (B)
increases
Q. A capacitor is connected across a battery and the plate separation of capacitor is increased without removing the battery, then:
✅ Correct Answer: (C)
energy stored will decrease
Q. 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 :
capacitors respectively will be :
✅ Correct Answer: (A)
8 V, 4 V
Q. An electric charge of 425 f µC is removed from a fully charged capacitor of capacitance 8.5µF. Its potential will be lowered by
✅ Correct Answer: (B)
100 V
Q. Minimum number of capacitor of 2µF each required to obtain a capacitance of 5µF will be:
✅ Correct Answer: (A)
4
Q. 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 :
✅ Correct Answer: (A)
more
Q. 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?
✅ Correct Answer: (C)
4 × 1010
Q. In the above question:
✅ Correct Answer: (B)
electrons are transferred from wool to x polythene
Q. In previous question, mass transferred to polythene is:
✅ Correct Answer: (A)
3.64 × 1020 kg
Q. 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 ?
✅ Correct Answer: (B)
30 V
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