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NEET 2008
Exam
NEET
Year
2008
Subject
Physics
Chapter
Capacitance

NEET 2008 · Physics · Capacitance

The energy required to charge a parallel plate condenser of plate...

The energy required to charge a parallel plate condenser of plate separation dd and plate area of cross-section A such that the uniform electric field between the plates is E, is

Options

  1. A12ε0E2Ad\frac{1}{2} \varepsilon_0 E^2 A d
  2. B12ε0E2/A.d\frac{1}{2} \varepsilon_0 E^2 / A . d
  3. Cε0E2/Ad\varepsilon_0 E^2 / A d
  4. Dε0E2Ad\varepsilon_0 \mathrm{E}^2 A d

Correct answer

A. 12ε0E2Ad\frac{1}{2} \varepsilon_0 E^2 A d

Step-by-step solution

 Energy required =12\text{ Energy required }=\frac{1}{2}C V²=\frac{1}{2} \varepsilon_0 E² Ad\mathrm{Ad}
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