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Summary A level Physics 9702 CIE Topic capacitance notes $3.94   Add to cart

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Summary A level Physics 9702 CIE Topic capacitance notes

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Contains all the definitions, formula and equations needed for the 9702 physics syllabus. Also includes all the required graphs which may come up in the exam.

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  • July 22, 2024
  • 11
  • 2023/2024
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Capacitance
Physics

, Capacitance


Capacitors




A capacitor consists of two parallel metal plates which are separated by an insulating material
called a dielectric. Dielectric can be air, vacuum, wax paper, oil or mica.

A capacitor does not store charge but stores energy.

When the capacity is initially uncharged, the number of positive and negative charges on each
plate are equal and the net charge is 0. During charging, the positive and negative charges are
separated. Work is done to move the charges from one plate to another and the work done is
stored as electrical energy.

Capacitance
It is the ratio of the charge on either plate to the p.d across the capacitor.




2

,Capacitance




3

, Capacitance




4

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