Answering General Questions: Electric Field, Potential, Capacitors

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SUMMARY

The discussion addresses fundamental concepts in electrostatics, specifically the relationship between electric potential and electric field, as well as the behavior of capacitors with dielectrics. It is established that a zero electric potential does not imply a zero electric field. The energy stored in a capacitor changes differently based on whether it is isolated or connected to a battery when a dielectric is introduced. Additionally, the forum explores the conditions under which the electric field and electric potential are zero along the line between two equal positive charges.

PREREQUISITES
  • Understanding of electric fields and potentials
  • Knowledge of capacitor behavior and dielectrics
  • Familiarity with electrostatic principles
  • Basic grasp of charge interactions
NEXT STEPS
  • Study the relationship between electric field and electric potential in detail
  • Explore the effects of dielectrics on capacitor energy storage
  • Investigate scenarios where electric fields and potentials are zero
  • Review the principles of electrostatics and charge interactions
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Students of physics, educators teaching electrostatics, and anyone interested in understanding the principles of electric fields, potentials, and capacitors.

moorec32
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I'm having trouble answering these questions and i was curious to see how other would answer them:

If the potential at a point is zero, must the electric field also be zero? (No)
Give an example.

How does the energy stored in a capacitor change when a dielectric is inserted if (a) the capacitor is isolated so Q doesn't change, (b) the capacitor remains connected to a battery so V doesn't change.

If there is a point along the line joining two equal positive charges where the electric field is zero? Where the electric potential is zero? Explain.
 
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First you should give your answers with your attempts at the explanation, so that we can understand your thoughts on these. Then you'll get all the help needed.
 

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