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#1 Class 12 Physics Electrostatic Potential and Capacitance 2023 Short 5M CBSE
Derive an expression for the capacitance of a parallel plate capacitor with air present between the two plates.
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#2 Class 12 Physics Electrostatic Potential and Capacitance 2020 Short 3M CBSE
Charges (+q) and (−q) are placed at points A and B, which are 2L apart. C is the midpoint between A and B. What is the work done in moving a charge +Q along the semicircle CRD?
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#3 Class 12 Physics Electrostatic Potential and Capacitance 2022 Mcq 1M CBSE
A uniform electric field pointing in positive X-direction exists in a region. A is origin, B is on X-axis at x = +1 cm, C is on Y-axis at y = +1 cm. Then the potential at A, B and C satisfy:
A. VA < VB
B. VA > VB
C. VA < VC
D. VA > VC
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#4 Class 12 Physics Electrostatic Potential and Capacitance 2021 Short 2M CBSE
Electrostatic potential is constant throughout the volume of a conductor and has the same value on its surface. Why?
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#5 Class 12 Physics Electrostatic Potential and Capacitance 2019 Short 2M CBSE
One charge particle is moved from A→C→B and another from A→D→B in a uniform external electric field. For which charge particle more work is needed?
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#6 Class 12 Physics Electrostatic Potential and Capacitance 2020 Short 2M CBSE
A capacitor of capacitance 50 µF is charged to a potential of 1000 V. Calculate the energy stored in the capacitor.
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#7 Class 12 Physics Electrostatic Potential and Capacitance 2022 Short 3M CBSE
A charge of 1 µC is placed at origin and another charge of 3 µC placed at (20 m, 0, 0) in external uniform electric field of 40 V/m î, with potential at origin = 0. Find the electrical potential energy of the system.
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#8 Class 12 Physics Electrostatic Potential and Capacitance 2024 Long 5M CBSE
(A) A dielectric slab of thickness t, is introduced between the plates of parallel plate capacitor of area A and separation d (where t<d). Find an expression for the capacitance with the dielectric slab. (B) A copp...
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#9 Class 12 Physics Electrostatic Potential and Capacitance 2023 Long 2M CBSE
If a charged hollow sphere and solid sphere of equal radii (aluminum and copper) are in electrostatic equilibrium, which statement is true? (A) Both have equal charges. (B) Hollow sphere has more surface charge. (C) A...
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#10 Class 12 Physics Electrostatic Potential and Capacitance 2021 Short 2M CBSE
For any charge configuration, equipotential surface through a point is normal to the electric field. Justify.
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#11 Class 12 Physics Electrostatic Potential and Capacitance 2020 Short 2M CBSE
In a certain 0.5 cm³ of space, electric potential is found to be 7 V throughout. What is the electric field in this region?
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#12 Class 12 Physics Electrostatic Potential and Capacitance 2018 Short 2M CBSE
Why is there no work done in moving a charge from one point to another on an equipotential surface?
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#13 Class 12 Physics Electrostatic Potential and Capacitance 2019 Short 2M CBSE
A hollow metal sphere of radius 5 cm is charged such that potential on its surface is 10 V. What is the potential at the centre of the sphere?
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#14 Class 12 Physics Electrostatic Potential and Capacitance 2020 Mcq 1M CBSE
A parallel plate capacitor with oil between the plates (dielectric constant K = 2) has a capacitance C. If the oil is removed, then capacitance of the capacitor becomes
A. C/2
B. 2C
C. C/4
D. 4C
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#15 Class 12 Physics Electrostatic Potential and Capacitance 2021 Mcq 1M CBSE
When two charged capacitors having capacitance and potential C₁, V₁ and C₂, V₂ respectively, are joined with a wire, the common potential will be
A. (C₁V₁ + C₂V₂)/(C₁+C₂)
B. (C₁V₁ − C₂V₂)/(C₁+C₂)
C. C₁V₁/C₂V₂
D. (V₁+V₂)/2
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#16 Class 12 Physics Electrostatic Potential and Capacitance 2019 Short 2M CBSE
A 10 µF capacitor is charged by a battery of e.m.f. 100 V. The electrostatic energy stored in the capacitor is
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#17 Class 12 Physics Electrostatic Potential and Capacitance 2022 Mcq 1M CBSE
A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates (battery disconnected). The quantity that remains unchanged is
A. Charge
B. Energy
C. Potential
D. Capacitance
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#18 Class 12 Physics Electrostatic Potential and Capacitance 2020 Mcq 1M CBSE
The energy stored in a capacitor is actually stored
A. between the plates
B. on the positive plate
C. on the negative plate
D. on the outer surfaces of the plates
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#19 Class 12 Physics Electrostatic Potential and Capacitance 2018 Mcq 1M CBSE
The charge on plate X in the given figure (capacitor with plate Y having charge +20 µC)
A. +20 µC
B. −20 µC
C. 0 µC
D. 40 µC
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#20 Class 12 Physics Electrostatic Potential and Capacitance 2019 Mcq 1M CBSE
A parallel plate air capacitor is charged to a potential difference of V. If distance between the plates is increased (battery disconnected), then potential difference between the plates
A. decreases
B. increases
C. becomes zero
D. does not change
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