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Electrostatic Potential and Capacitance Quiz Set-1 MCQ Online Practice Test | Class 12 | Quiz Tweek

Electrostatic Potential and Capacitance Quiz Set-1

Practice Important MCQs for Electrostatic Potential and Capacitance — Physics, Class 12.

Class 12 Physics Chapter 2 Quiz: Electrostatic Potential and Capacitance

Master the concepts of Electrostatic Potential and Capacitance with this targeted quiz designed for CBSE Class 12 Physics students. This set focuses on high-yield topics from the NCERT syllabus, including Potential Difference, Equipotential Surfaces, Electric Potential Energy, and Capacitors (series/parallel combinations and dielectrics). It features questions modeled after CBSE Previous Year Questions (PYQs) to help you recognize exam patterns, such as the effect of dielectric slabs on capacitance and potential due to systems of charges. Ideal for board exam revision and entrance test (JEE/NEET) foundation building, this quiz tests both theoretical understanding and numerical problem-solving skills to ensure comprehensive preparation.

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Q1. Which of the following statements is true for an equipotential surface?

(A)

Electric field lines are parallel to the equipotential surface.

(B)

Work done in moving a charge from one point to another on the surface is zero.

(C)

Equipotential surfaces for a point charge are cylindrical.

(D)

Two equipotential surfaces can intersect each other.

Q2. The electric potential $V$ at a distance $r$ from a point charge $q$ is given by:

(A)

$V = \frac{1}{4\pi\epsilon_0} \frac{q}{r^2}$

(B)

$V = \frac{1}{4\pi\epsilon_0} \frac{q}{r}$

(C)

$V = \frac{1}{4\pi\epsilon_0} q r$

(D)

$V = \frac{1}{4\pi\epsilon_0} \frac{q^2}{r}$

Q3. A parallel plate capacitor has a capacitance of $C$ . If the distance between the plates is halved, the new capacitance will be:

(A)

$C/2$

(B)

$2C$

(C)

$C/4$

(D)

$4C$

Q4. The electrostatic potential energy of a system of two charges $q_1$ and $q_2$ separated by a distance $r$ in vacuum is:

(A)

$\frac{q_1 q_2}{4\pi\epsilon_0 r^2}$

(B)

$\frac{q_1 q_2}{4\pi\epsilon_0 r}$

(C)

$\frac{q_1 + q_2}{4\pi\epsilon_0 r}$

(D)

Zero

Q5. Identify the physical quantity whose SI unit is $J C^{-1}$ .

(A)

Electric Flux

(B)

Electric Potential

(C)

Electric Dipole Moment

(D)

Electric Field Intensity

Q6. 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:

(A)

Decreases by a factor of 2

(B)

Remains the same

(C)

Increases by a factor of 2

(D)

Increases by a factor of 4

Q7. Twenty-seven drops of same size are charged at $220 V$ each. They combine to form a bigger drop. Calculate the potential of the bigger drop.

(A)

$660 V$

(B)

$1320 V$

(C)

$1980 V$

(D)

$1500 V$

Q8. The electric potential at a point on the equatorial line of an electric dipole is:

(A)

Positive

(B)

Negative

(C)

Zero

(D)

Dependent on the distance

Q9. Three capacitors each of capacitance $9 pF$ are connected in series. What is the total capacitance of the combination?

(A)

$27 pF$

(B)

$9 pF$

(C)

$3 pF$

(D)

$1 pF$

Q10. Which material is used as a dielectric in capacitors to increase capacitance?

(A)

Copper

(B)

Mica

(C)

Aluminum

(D)

Silver

Q11. If a dielectric slab of dielectric constant $K$ is introduced between the plates of a parallel plate capacitor completely filling the space, the capacitance becomes:

(A)

$K$ times

(B)

$1/K$ times

(C)

$K^2$ times

(D)

Unchanged

Q12. The work done to move a charge of $2 C$ between two points with a potential difference of $5 V$ is:

(A)

$2.5 J$

(B)

$0.4 J$

(C)

$10 J$

(D)

$7 J$

Q13. Electric field $E$ and Electric Potential $V$ are related as:

(A)

$E = -\frac{dV}{dr}$

(B)

$E = \frac{dV}{dr}$

(C)

$E = V \times r$

(D)

$V = E \times r^2$

Q14. The capacitance of a spherical conductor of radius $R$ is proportional to:

(A)

$R^2$

(B)

$1/R$

(C)

$R$

(D)

$R^0$

Q15. What is the angle between electric field lines and an equipotential surface?

(A)

$0^\circ$

(B)

$90^\circ$

(C)

$180^\circ$

(D)

$45^\circ$

...and 5 more challenging questions available in the interactive simulator.

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Frequently Asked Questions

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What formula is used for energy stored in a capacitor in these questions?

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Is the concept of Equipotential Surfaces important for exams?