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#electrostatic induction

3 public questions tagged with this topic.

Capacitor with Dielectric and Effect of Inserting Slab

In a system where a positively charged sphere is enclosed by an uncharged conducting shell, why does the outer surface o

**Effect of dielectric** is to reduce effective field due to polarization, bound surface charges opposite to free charges, net field E = E₀ - E_p = E₀/K. Capacitance C = Q/V = K ε₀ A/d for full filling, partial filling C = ε₀ A/(d - t + t/K) for slab thickness t. The positively charged sphere induces a negative charge on the inner surface of the shell and a positive charge on its outer surface to maintain zero field inside the conductor. When a negative charge is brought near the shell, it repels negative charges to the far side of the shell and attracts positive

Ref: NCERT > Physics Book > Electrostatic Potential and Capacitance > Capacitor with Dielectric and Effect of Inserting Slab

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Potential Energy of System of Charges

In a system where a charged conductor is placed near an uncharged conductor, why does the uncharged conductor experience

**System of charges** potential energy is sum over pairs U = Σ k q_i q_j/r_ij, work required to assemble charges from infinity. For 28 μC and -14 μC, 0.28 m apart, U=9×10⁹×28×(-14)×10⁻¹²/0.28= -12.6 J, negative indicates bound system. The charged conductor induces charges on the uncharged conductor: opposite charges on the near side and like charges on the far side. The distance between the opposite charges is smaller than between like charges, so the attractive force (proportional to 1/r² ) between opposite charges dominates over the repulsive force between like charges. This imbalance results in a net attractive force, even though the uncharged conductor has

Ref: NCERT > Physics Book > Electrostatic Potential and Capacitance > Potential Energy of System of Charges

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Coulomb's Law and Force Between Point Charges

In an experiment, a charged object is brought near a neutral conductor, causing charge separation. What phenomenon is re

**Electrostatic force** described by F = (1/4π ε₀)·q₁q₂/r² obeys Newton's third law. Magnitude depends on q₁q₂ and 1/r², enabling quantitative estimation at given separation, with sign indicating attraction or repulsion. Electrostatic induction occurs when a charged object induces a separation of charges in a neutral conductor. The electric field of the charged object attracts opposite charges and repels like charges, redistributing them without direct contact. Substituting values gives Electrostatic induction, which matches expected magnitude for this electrostatic configuration, confirming Coulomb's and Gauss's principles and charge quantization consistency.

Ref: NCERT > Physics Book > Electric Charges and Fields > Coulomb's Law and Force Between Point Charges

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