NEET PhysicsNCERT Class 12Electrostatics

Electrostatic Potential and Capacitance: NEET questions with solutions

NEET tests potential as a signed scalar sum, work done between two points, potential energy of charge systems and of a dipole in a field, the electrostatics of conductors, and capacitors: dielectrics, series-parallel networks, stored energy and charge sharing. Marks are lost by dropping signs, by treating potential as a vector, and by forgetting which quantity stays fixed once the battery is removed.

Revise first: NCERT notes for Electrostatic Potential and Capacitance

Questions

10 questions · answers after you pick

1Point charges of +4 nC and −6 nC are fixed 20 cm apart in air. What is the electric potential at the midpoint of the line joining them? (k =…Potential due to a system of chargesEasySingle correct 2A charge of +3 μC is moved slowly (no change in kinetic energy) from a point A at a potential of 20 V to a point B at a potential of 80 V.…Electrostatic potentialEasySingle correct 3A charged metal body is in electrostatic equilibrium. Which of the following statements about it are correct?Electrostatics of conductorsMediumStatement based 4Charges of +1 μC, +2 μC and −3 μC are placed at the corners of an equilateral triangle of side 30 cm in air. What is the electrostatic…Potential energy of a system of chargesMediumSingle correct 5A parallel plate capacitor is charged by a battery to charge Q₀ and stored energy U₀. The battery is then disconnected, and a slab of…Effect of dielectric on capacitanceMediumSingle correct 6Capacitors of 2 μF and 3 μF are connected in parallel, and this pair is connected in series with a 5 μF capacitor. The combination is…Combination of capacitorsMediumSingle correct 7A 4 μF capacitor charged to 50 V is disconnected from its supply and connected across an uncharged 6 μF capacitor (positive plate to one…Energy stored in a capacitorHardSingle correct 8A small test charge is carried around a circle centred on an isolated point charge. Read the Assertion (A) and Reason (R) about this and…Equipotential surfacesMediumAssertion–Reason 9An electric dipole of moment 4.0 × 10⁻⁹ C m is in stable equilibrium in a uniform field of 2.0 × 10⁵ N C⁻¹. How much work must an external…Potential energy in an external fieldHardSingle correct 10Match each quantity in List I with how it depends on the distance r from the source in List II (for the dipole, r is much larger than its…Potential due to a dipoleEasyMatch the following

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