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SubjectsPhysics
समांतर प्लेट संधारित्र
In this Class 12 Physics topic from Electrostatic Potential and Capacitance, students learn how a parallel plate capacitor stores electric charge and energy between two conducting plates separated by an insulating medium. The topic explains capacitance, the factors affecting it, and the relation C = εA/d, connecting capacitance with plate area, separation, and dielectric material. It also develops understanding of electric field, potential difference, dielectric insertion, charging, and the energy stored in a capacitor through clear concepts and applications.
TOPIC PRACTICE
Up to 2 questions from this page. Select your focus, then start.
For a dipole in a uniform electric field, the potential energy is U = −pE cos θ. If the dipole is parallel to the field, θ = 0° and cos θ = 1, so U = −pE, its minimum possible value for fixed p and E. At 90° the energy is zero, while at 180° it is +pE and maximum. Thus option A is correct.
The orientation energy of a dipole is U = −pE cos θ. For the dipole opposite to the field, θ = 180° and cos 180° = −1; hence U = +pE, the maximum value when p and E are fixed. Parallel orientation gives −pE, the minimum, and perpendicular orientation gives zero. The opposite arrangement is therefore an unstable equilibrium.
QUIZ COMPLETE
