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 (D)</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 (D)</p> Signup and view all the answers

What is the main function of a capacitor?

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

What are the requirements for creating a capacitor?

<p>Two conducting plates separated by a dielectric (C)</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 (B)</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 (D)</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 (B)</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 (A)</p> Signup and view all the answers

What is the SI unit for capacitance?

<p>Farad (D)</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>$\frac{A}{\epsilon_0 \cdot d}$ (B)</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 (B)</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 (D)</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 (A)</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 (C)</p> Signup and view all the answers

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