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A Level Physics Tutor

Parallel Plate Capacitors

Introduction
 

A parallel plate capacitor consists of two conducting plates separated by an insulating material known as a dielectric. The capacitance depends on the area of the plates, the separation between them and the properties of the dielectric. Understanding how these factors affect capacitance is essential for explaining the design and operation of capacitors used in electronic devices.
 

AQA A Level Physics Specification: 3.7.3.2 Parallel Plate Capacitors
 

What You Need to Know
 

  • Describe the structure of a parallel plate capacitor.

  • Explain how charge is stored on the capacitor plates.

  • Understand the role of the dielectric between the plates.

  • State how capacitance depends on the plate area and plate separation.

  • Explain the effect of inserting a dielectric on the capacitance.

  • Apply the equation for the capacitance of a parallel plate capacitor.

  • Describe the energy stored in the electric field between the plates.

  • Solve quantitative problems involving parallel plate capacitors and dielectrics.
     

Downloadable Topic Pack
 

Parallel Plate Capacitors Topic Pack Exam Questions and Answers
 

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