Electric Field Magnitude Calculation in Capacitors
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Questions and Answers

What is the SI unit for the electric field?

  • Coulomb/Volt (C/V)
  • Meter/Coulomb (m/C)
  • Newton/Coulomb (N/C) (correct)
  • Joule/Meter (J/m)

    • What is the formula to calculate the magnitude of the electric field between the plates of a capacitor?

  • $\frac{QE}{A}$ (correct)
  • $\frac{A}{QE}$
  • $\frac{Q}{EA}$
  • $\frac{E}{Q}$

    • In the sample problem provided, what is the plate area of the parallel capacitor?

  • $0.025 \, m^2$
  • $0.02 \, m^2$ (correct)
  • $0.05 \, m^2$
  • $0.005 \, m^2$

    • What happens to the magnitude of the electric field between capacitor plates if the plate area increases?

    <p>Increases</p> Signup and view all the answers

    If the plate separation of a capacitor is doubled while keeping other factors constant, what effect does this have on the electric field magnitude?

    <p>Halves</p> Signup and view all the answers

    What is the main function of a capacitor?

    <p>Store potential energy in an electric field</p> Signup and view all the answers

    What are the requirements for creating a capacitor?

    <p>Two conducting plates separated by a dielectric</p> Signup and view all the answers

    In a capacitor, when one plate carries a positive charge, what charge does the other plate carry?

    <p>Negative charge</p> Signup and view all the answers

    What role do insulators like paper, plastic (Teflon), or rubber play in capacitors?

    <p>Block the flow of electric charges</p> Signup and view all the answers

    What does the term 'capacitance' refer to in electrical circuits?

    <p>The ability to store energy in the form of electrical charge</p> Signup and view all the answers

    How does the electric field in a capacitor affect the electrons in the wire near the conducting plates?

    <p>Causes the electrons to move onto the plates</p> Signup and view all the answers

    What is the SI unit for capacitance?

    <p>Farad</p> Signup and view all the answers

    What is the formula for calculating the capacitance of a parallel plate capacitor without a dielectric material?

    <p>$\frac{A}{\epsilon_0 \cdot d}$</p> Signup and view all the answers

    In the context of capacitance, what does the term 'plate separation' refer to?

    <p>The distance between the plates of the capacitor</p> Signup and view all the answers

    How does introducing a dielectric material affect the capacitance of a parallel plate capacitor?

    <p>Increases the capacitance</p> Signup and view all the answers

    If the plate area of a parallel plate capacitor is doubled while keeping other factors constant, how does this change affect the capacitance?

    <p>Doubles</p> Signup and view all the answers

    What quantity must be known in order to calculate the capacitance of a parallel plate capacitor?

    <p>Plate area and plate separation</p> Signup and view all the answers

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