HomeTestsSearchRankProfile

Capacitors Questions

Practice 22 Capacitors questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

📚
22
Total Questions
🟢
4
Easy
🟡
14
Medium
🔴
4
Hard
Practice by Exam:Physics(21)PHYSICS(1)

About Capacitors — practice questions, PYQs & concepts

Capacitors is a frequently-tested topic on Physics, PHYSICS. ExamTest.live currently lists 22 Capacitors questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Capacitors weight in competitive exams

Across our Capacitors question bank, the largest sources are Physics (21) and PHYSICS (1). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 4 easy Capacitors questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
  • Time yourself: Every question shows the average solve time so you can benchmark your speed against other students.
  • Read every explanation: Even on questions you got right — the explanation often surfaces a faster approach you can reuse.

All Capacitors Questions(1–22 of 22)

Filter:
Q1mediummcqPhysicsNEET 20192026
0% accuracy
A parallel plate capacitor of capacitance is being charged by a voltage source whose potential is changing at the rate of . The conduction current through the connecting wires, and the displacement current through the plates of the capacitor, would be, respectively:
Q2mediummcqPhysicsJEE Main2026
Two capacitors and are charged to and respectively. It is found that by connecting them together the potential on each one can be made zero. Then:
Q3mediummcqPhysicsAIEEE2026
A parallel plate capacitor with air between the plates has a capacitance of . The separation between its plates is ‘ ’. The space between the plates is now filled with two dielectrics. One has and thickness while the other has and thickness . Capacitance of the capacitor is now:
Q4mediummcqPhysicsNEET (UG) 20242026
If the plates of a parallel plate capacitor connected to a battery are moved close to each other, then:A. the charge stored in it, increases.B. the energy stored in it, decreases.C. its capacitance increases.D. the ratio of charge to its potential remains the same.E. the product of charge and voltage increases.Choose the most appropriate answer:
Q5easymcqPhysicsNEET (UG) 20242026
A parallel plate capacitor is charged by connecting it to a battery through a resistor. If is the current in the circuit, then in the gap between the plates:
Q6mediummcqPhysicsNEET (UG) 20242026
In the following circuit, the equivalent capacitance between terminal A and terminal B is:
image
Q7hardmcqPhysicsNEET 20222026
A capacitor of capacitance is charged fully by battery. Then the battery is disconnected and the capacitor is connected to another uncharged capacitor of capacitance . The electrostatic energy stored by the system is:
image
Q8mediummcqPhysicsNEET 20212026
A parallel plate capacitor has a uniform electric field in the space between the plates. If the distance between the plates is and the area of each plate is , the energy stored in the capacitor is: ()
Q9mediummcqPHYSICSNEET 20192026
Two identical capacitors and of equal capacitance are connected as shown in the circuit. Terminals and of the key are connected to charge capacitor using a battery of emf volt. Now disconnecting and terminals, terminals and are connected. Due to this, what will be the percentage loss of energy?
image
Q10easymcqPhysicsNEET 20172026
A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system:
Q11mediummcqPhysicsPhysics
0% accuracy
A parallel plate capacitor made of circular plates is being charged such that the surface charge density on its plates is increasing at a constant rate with time. The magnetic field arising due to displacement current is:
Q12mediummcqPhysicsPhysics
0% accuracy
The plates of a parallel plate capacitor are separated by . Two slabs of different dielectric constant and with thickness and , respectively are inserted in the capacitor. Due to this, the capacitance becomes two times larger than when there is nothing between the plates. If , the value of is:
Q13mediummcqPhysicsPhysics
0% accuracy
In an ac circuit an alternating voltage volts is connected to capacitor of capacity . The r.m.s. value of the current in the circuit is:
Q14mediummcqPhysicsPhysics
25% accuracy
A parallel plate condenser has a uniform electric field (V/m) in the space between the plates. If the distance between the plates is (m) and area of each plate is (), the energy (joules) stored in the condenser is:
Q15hardmcqPhysicsPhysics
A parallel-plate capacitor of area , separation and capacitance is filled with four dielectric materials as shown. If a single dielectric material is to be used to have the same capacitance , then its dielectric constant is:
image
Q16hardmcqPhysicsPhysics
image
A capacitor of is charged as shown in the diagram. When the switch is turned to position 2, the percentage of its stored energy dissipated is:
Q17mediummcqPhysicsPhysics
A parallel plate air capacitor has capacity , distance of separation between plates is and potential difference is applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is:
Q18easymcqPhysicsPhysics
Two thin dielectric slabs of dielectric constants and () are inserted between plates of a parallel plate capacitor. The variation of electric field ' ' between the plates with distance ' ' as measured from plate is correctly shown by:
image
image
Q19easymcqPhysicsPhysics
A parallel plate capacitor has a uniform electric field in the space between the plates. If the distance between the plates is and area of each plate is , the energy stored in the capacitor is:
Q20hardmcqPhysicsPhysics
A series combination of capacitors, each of value , is charged by a source of potential difference . When another parallel combination of capacitors, each of value , is charged by a source of potential difference , it has the same (total) energy stored in it, as the first combination has. The value of , in terms of , is then:
Q21mediummcqPhysicsPhysics
The energy required to charge a parallel plate condenser of plate separation and plate area of cross-section such that the uniform electric field between the plates is , is:
Q22mediummcqPhysicsPhysics
Two condensers, one of capacity and the other of capacity are connected to a volt battery, as shown. The work done in charging fully both the condensers is:

Frequently Asked Questions

How many Capacitors questions are on ExamTest.live?▼
We have 22 Capacitors questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.
Are Capacitors MCQs free?▼
Yes. All Capacitors questions, answers, and explanations on ExamTest.live are completely free. No account or subscription required.
Which exams include Capacitors questions?▼
Capacitors questions are commonly asked in Physics, PHYSICS. You can filter by exam using the links above.
How do I practice Capacitors questions effectively?▼
Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.