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#1 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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#2 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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#3 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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#4 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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#5 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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#6 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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#7 Class 12 Physics Electrostatic Potential and Capacitance 2021 Mcq 1M CBSE
Minimum number of capacitors of 2 µF each required to obtain a capacitance of 5 µF will be
A. 4
B. 3
C. 5
D. 6
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#8 Class 12 Physics Electrostatic Potential and Capacitance 2016 Mcq 1M CBSE
The capacitance of a parallel plate capacitor ..........by the introduction of a dielectric between the plates of capacitor.
A. increases
B. decreases
C. remains same
D. nothing can be said
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#9 Class 12 Physics Electrostatic Potential and Capacitance 2018 Mcq 1M CBSE
Two plates of a parallel plate capacitor are 1 cm apart and potential difference between them is 10 V. The electric field between the plates is
A. 100 V/m
B. 1000 V/m
C. 10 V/m
D. 10000 V/m
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#10 Class 12 Physics Electrostatic Potential and Capacitance 2017 Mcq 1M CBSE
The ratio of charge to potential of a capacitor is known as its
A. Capacitance
B. Conductance
C. Inductance
D. Resistance
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#11 Class 12 Physics Electrostatic Potential and Capacitance 2019 Mcq 1M CBSE
If 125 water drops of equal radius and equal capacitance C, coalesce to form a single drop of capacitance C', the relation between C and C' is
A. C' = C/5
B. C' = 5C
C. C' = 25C
D. C' = C/25
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#12 Class 12 Physics Electrostatic Potential and Capacitance 2018 Mcq 1M CBSE
If the uniform electric field exists along X-axis, then equipotential surface is along
A. XY-plane
B. XZ-plane
C. YZ-plane
D. anywhere
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#13 Class 12 Physics Electrostatic Potential and Capacitance 2020 Mcq 1M CBSE
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/x
B. 1/x²
C. 1/x³
D. x
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#14 Class 12 Physics Electric Charges and Fields 2022 Short 3M CBSE
A point charge +10 µC is at a distance 5 cm directly above the centre of a square of side 10 cm as shown in figure. What is the magnitude of the electric flux through the square?
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#15 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
If the electric field is given by E = 6î + 3ĵ + 4k̂, calculate the electric flux through a surface of area 20 units lying in the yz-plane.
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#16 Class 12 Physics Electric Charges and Fields 2023 Short 3M CBSE
In a certain region of space, electric field is along the z-direction throughout. The magnitude of electric field is however not constant but increases uniformly along the positive z-direction at the rate of 10⁵ N/C p...
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#17 Class 12 Physics Electric Charges and Fields 2023 Short 3M CBSE
Two charges of +25 × 10⁻⁹ C and -25 × 10⁻⁹ C are placed 6 m apart. Find the electric field at a point 4 m from the centre of the electric dipole (a) On axial line (b) On equatorial line.
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#18 Class 12 Physics Electric Charges and Fields 2022 Short 3M CBSE
A particle of mass 10⁻³ kg and charge 5 µC is thrown at a speed of 20 m/s against a uniform electric field of strength 2 × 10⁵ N/C. How much distance will it travel before coming to rest momentarily?
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#19 Class 12 Physics Electric Charges and Fields 2024 Short 2M CBSE
Two insulated charged copper spheres A and B each having charge of 6.5 × 10⁻⁷ C are separated by a distance 50 cm. If they are placed in water of dielectric constant 80, then find the electrostatic force of repulsion ...
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#20 Class 12 Physics Electric Charges and Fields 2024 Short 3M CBSE
Three charges 10 µC, 5 µC and -5 µC are placed in air at the three corners A, B and C of an equilateral triangle of side 0.1 m. Find the resultant force experienced by the charge placed at corner A.
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