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#induced charge

2 public questions tagged with this topic.

Potential Energy of System of Charges

In a system where a charged conductor is placed inside a larger uncharged hollow conductor, why does the inner conductor

**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. When a charged conductor (charge Q ) is placed inside a larger uncharged hollow conductor, the electric field from the inner charge induces -Q on the inner surface of the hollow conductor to ensure the field inside the conductor's material is zero. Since the hollow conductor is initially uncharged, its total charge must remain zero, so +Q appears on its outer sur

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

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Electric Dipole - Moment, Field and Torque

What explains why the electric field outside a neutral object can be non-zero when placed in an external field?

**Interaction of dipole with uniform field** produces pure couple without net force, equal opposite forces forming torque. Potential energy minimum -pE at alignment, maximum +pE at anti-alignment, governing orientation dynamics. Induced charge separation occurs in a neutral object under an external field, creating dipoles or surface charges. These induced charges produce their own field, which adds to the external field, resulting in a non-zero total field outside. Substituting values gives Induced charge separation, which matches expected magnitude for this electrostatic configuration, confir

Ref: NCERT > Physics Book > Electric Charges and Fields > Electric Dipole - Moment, Field and Torque

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