Class 12 Physics MCQ Chapter 2 Electrostatic Potential and Capacitance Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Physics MCQ Chapter 2 Electrostatic Potential and Capacitance Question Answer in English and select need one. AHSEC Class 12 Physics Objective Type Question Answer As Per AHSEC New Book Syllabus Download PDF. AHSEC Physics MCQ Class 12 Solutions.
Class 12 Physics MCQ Chapter 2 Electrostatic Potential and Capacitance
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Physics Multiple Choice Solutions in English Medium are part of All Subject Solutions. Here we have given AHSEC Class 12 Physics MCQ Question Answer English Medium for All Chapters, You can practice these here.
Electrostatic Potential and Capacitance
Chapter: 2
| MCQs |
Choose the correct option:
1. Which of the following statements is true?
(a) Electrostatic force is a conservative force.
(b) Potential at a point is the work done per unit charge in bringing a charge from any point to infinity.
(c) Electrostatic force is non-conservative.
(d) Potential is the product of charge and work.
Ans: (a) Electrostatic force is a conservative force.
2. Two metal plates having potential influence 800 V are 0.02 m apart horizontally. A particle of mass 1.96 ×10-18 kg is suspended in equilibrium between the plates. If e is the elementary charge, then charge on the particle
(a) 8e
(b) 6e
(c) 3e
(d) e
Ans: (c) 3e.
3. Four +ve point charges of the same magnitude (Q) are placed at four corners of a rigid square frame as shown in figure. The plane of the frame is perpendicular to the Z axis. If a ve point charge is placed at a distance z away from the above frame (z << L), then:
(a) – ve charge oscillates along the Z axis.
(b) It moves away from the frame.
(c) It moves slowly towards the frame and stays in the plane of the frame.
(d) It passes through the frame only once.
Ans: (a) – ve charge oscillates along the Z axis.
4. In a region of constant potential:
(a) the electric field is uniform.
(b) the electric field is zero.
(c) there can be no charge inside the region.
(d) both (b) and (c) are correct.
Ans: (d) both (b) and (c) are correct.
5. A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates:
(a) Does not change.
(b) Becomes zero.
(c) Increases.
(d) Decreases.
Ans: (c) Increases.
6. There are 10 units of charge at the centre of a circle of radius 1.0 m. The work done in moving 1 unit of charge once around the circle is:
(a) 10 units.
(b) 100 units.
(c) Zero.
(d) 150 units.
Ans: (c) Zero.
7. Dielectric constant for a metal is:
(a) zero.
(b) infinite.
(c) 1
(d) 10
Ans: (b) infinite.
8. Two concentric spheres of radii Rand have similar charges with equal surface charge densities. What is the electric potential at their common centre?
(α) 𝞂/ε0
(b)
(c) R𝞂/ε0
(d)
Ans: (b)
9. How much work is required to carry a 6 µε charge from the negative terminal to the positive terminal of a 9 V battery?
(a) 54 × 10-3 J
(b) 54 × 10-6
(c) 54 × 10-9J
(d) 54 × 10-12 J
Ans: (b) 54 × 10-6
10. In a parallel plate capacitor, the capacity increases if:
(a) Area of the plate is decreased.
(b) Distance between the plates increases.
(c) Area of the plate is increased.
(d) Dielectric constantly decreases.
Ans: (c) Area of the plate is increased.
11. Electric potential of earth is taken to be zero because earth is a good:
(a) Dielectric.
(b) Semiconductor.
(c) Insulator.
(d) Conductor.
Ans: (d) Conductor.
12. In bringing an electron towards another electron, electrostatic potential energy:
(a) Increases.
(b) Decreases.
(c) Becomes zero.
(d) Remains the same.
Ans: (a) Increases.
13. A capacitor has a dielectric between its plates and is connected to a DC source. After the battery is disconnected, the dielectric is removed. What will happen next?
(a) Capacitance will increase.
(b) Energy stored will decrease.
(c) Electric field will increase.
(d) Voltage will decrease.
Ans: (c) Electric field will increase.
14. The electrostatic potential (Φr) of a spherically symmetric system, kept at origin, is shown in figure and given as:
Which of the following option(s) is/are correct?
(a) For spherical regions r ≤ R0 total electrostatic energy stored is zero.
(b) Within r = 2R0, total charge is q.
(c) There will be no charge anywhere except at r = R0.
(d) Electric field is discontinuous at r = R0.
Ans: (a) For spherical regions r ≤ R0 total electrostatic energy stored is zero.
15. A charge of 5C is given a displacement of 0.5 m. The work done in the process is 10 J. The potential difference between the two points will be:
(a) 30 V
(b) 5 V
(c) 0.25 V
(d) 2 V
Ans: (d) 2 V
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