Electric Charge and Capacitance Quiz
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Questions and Answers

What is the unit of capacitance?

  • Coulomb
  • Farad (correct)
  • Volt
  • Ampere

    • What is the formula to calculate the capacitance of a parallel plate capacitor?

  • C = εοAd
  • C = εοd/A
  • C = εοA/d (correct)
  • C = εο/A/d

    • What is the purpose of a capacitor in an electric circuit?

  • To generate electricity
  • To increase voltage
  • To temporarily store electric charges (correct)
  • To convert AC to DC

    • What is the effect of increasing the area of the plates of a parallel plate capacitor on its capacitance?

    <p>It increases the capacitance</p> Signup and view all the answers

    What is the ratio of the magnitude of the charge on either conductor to the magnitude of the potential difference between the conductors?

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

    What is the dielectric material in a capacitor that separates the two plates?

    <p>An insulator</p> Signup and view all the answers

    What is the formula to calculate the capacitance of a parallel-plate capacitor?

    <p>C = εo A / d</p> Signup and view all the answers

    What is the unit of the dielectric constant εo?

    <p>Coulombs per Newton-meter squared (C/Nm^2)</p> Signup and view all the answers

    A parallel-plate capacitor has a capacitance of 2.213 × 10^−11 F. If it is connected to a 9-volt battery, what is the charge accumulated on the plates?

    <p>1.992 × 10^−10 C</p> Signup and view all the answers

    What is the area of the square metal plates in the given problem?

    <p>2.5 × 10^−3 m^2</p> Signup and view all the answers

    What is the distance between the two square metal plates?

    <p>0.001 m</p> Signup and view all the answers

    What is the formula to calculate the charge on a capacitor?

    <p>Q = CV</p> Signup and view all the answers

    What is the correct formula for calculating the capacitance of a parallel-plate capacitor?

    <p>$C = \frac{k \in{}_{o}A}{d}$</p> Signup and view all the answers

    What is the purpose of a circuit diagram?

    <p>To show the path of the real circuit</p> Signup and view all the answers

    What is the unit of the permittivity of free space?

    <p>Coulomb per Newton meter (C/N·m)</p> Signup and view all the answers

    What is the purpose of a dielectric material in a parallel-plate capacitor?

    <p>To increase the capacitance of the capacitor</p> Signup and view all the answers

    What is the unit of capacitance?

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

    What is the dielectric constant (k) of a material?

    <p>A dimensionless quantity</p> Signup and view all the answers

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