In Class 12 Physics Chapter 2, titled "Electrostatic Potential and Capacitance," students delve into the principles of electrostatics, focusing on electrostatic potential, capacitance, and their calculations. This chapter explores essential concepts, including the work done in moving charges, potential energy in a system of charges, and capacitors. Mastering these topics lays a solid groundwork for understanding complex electric circuits and systems.
In this article, students can access a downloadable PDF featuring MCQs tailored for CUET and CBSE/State Board exams. Additionally, a compilation of 10 years of Previous Year Questions (subjective) from NCERT/CBSE is provided without solutions. This resource allows students to practice and thoroughly understand the critical concepts in this chapter.
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NCERT Class 12 Physics Chapters
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1.
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A point P lies at a distance x from the midpoint of an electric dipole on its axis. The electric potential at point P is proportional to
(a) 1/X2 (b) 1/X3 (c) 1/X4 (d) 1/X1/2
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2.
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The capacitors, each of 4 μF are to be connected in such a way that the effective capacitance of the combination is 6 μF. This can be achieved by connecting
(a) All three in parallel
(b) All three in series
(c) Two of them connected in series and the combination in parallel to the third.
(d) Two of them connected in parallel and the combination in series to the third.
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3.
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Two capacitors of capacitances C1 and C2 are connected in parallel. If a charge Q is given to the combination, the ratio of the charge on the capacitor C1 to the charge on C2 will be
(a) |
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4.
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Ten capacitors, each of capacitance 1 μF, are connected in parallel to a source of 100 V. The total energy stored in the system is equal to :
(A) 10-2 J (B) 10-3 J (C) 0·5 × 10-3 J (D) 5·0 × 10-2 J
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1.
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Obtain an expression for electrostatic potential energy of a system of three charges q, 2q and – 3q placed at the vertices of an equilateral triangle of side a.
(CBSE 2023, 2M,)
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2.
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Three point charges Q1 (–15μ C), Q2 (10 μC) and Q3 (16 μC) are located at (0 cm, 0 cm), (0 cm, 3 cm) and (4 cm, 3 cm) respectively. Calculate the electrostatic potential energy of this system of charges.
(CBSE 2023, 3M)
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3.
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A charge Q is distributed over the surfaces of two concentric hollow spheres of radii r and R (R >> r), such that their surface charge densities are equal. Derive the expression for the potential at the common centre.
(CBSE 2019, 3M,)
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4.
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A capacitor made of two parallel plates, each of area ‘A’ and separation ‘d’ is charged by an external dc source. Show that during charging, the displacement current inside the capacitor is the same as the current charging the capacitor.
(CBSE 2019, 2M)
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NCERT Science Subjects
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Unit Name |
Sub Areas of Chapter 2: Electrostatic Potential and Capacitance |
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Electrostatic Potential and Capacitance |
2.1 Introduction |
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2.2 Electrostatic Potential |
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2.3 Potential Due to a Point Charge |
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2.4 Potential Due to a System of Charges |
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2.5 Equipotential Surfaces |
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2.6 Potential Energy of a System of Charges |
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2.7 Potential Energy in an External Field |
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2.8 Electrostatics of Conductors |
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2.9 Dielectrics and Polarization |
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2.10 Capacitors and Capacitance |
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2.11 The Parallel Plate Capacitor |
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2.12 Effect of Dielectric on Capacitance |
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2.13 Combination of Capacitors |
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2.14 Energy Stored in a Capacitor |
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2.15 Van de Graaff Generator |
NCERT Class 12 Physics Chapter 2 focuses on 'Electrostatic Potential and Capacitance,' where students learn about the potential energy of systems, capacitor function, and properties of dielectrics. The concepts covered in NCERT Class 12 Physics Chapter 2 are fundamental for understanding circuits in electronics.
The chapter also explores energy storage in capacitors and their use in practical circuits, helping students develop a strong foundation in circuit analysis. NCERT Class 12 Physics Chapter 2 lays the groundwork for advanced studies in electrical potential and energy distribution.
(b) 
(c) 
(d) 
