Physics: Resistance and Conductance
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Questions and Answers

What is the unit of resistance?

  • Ohm (correct)
  • Coulomb
  • Volt
  • Ampere

    • What does the slope of the plot of current versus voltage for a resistor represent?

  • Power dissipation
  • Current flow
  • Resistance value (correct)
  • Voltage across the resistor

    • What does a positive power value indicate for a resistor?

  • Energy release
  • Change in resistance
  • Energy absorption (correct)
  • No energy transfer

    • If a 560 Ω resistor has a current of 42.4 mA flowing through it, what is the voltage across the resistor and the power it is dissipating?

    <p>$23.7 V$ and $1.007 W$</p> Signup and view all the answers

    What is the formula for resistance of a wire?

    <p>R=ρl/A</p> Signup and view all the answers

    What is the unit of conductance?

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

    What does an open circuit between A and B mean?

    <p>i=0, v=0</p> Signup and view all the answers

    What is the equivalent resistance of a short circuit between A and B?

    <p>$R = 0 Ω$</p> Signup and view all the answers

    What is the unit for the rate of flow of charge?

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

    What does a positive power value indicate about an element?

    <p>It is absorbing energy</p> Signup and view all the answers

    What does a negative power value indicate about an element?

    <p>It is supplying energy</p> Signup and view all the answers

    What does the relationship between voltage and current define for a circuit element?

    <p>The resistance of the element</p> Signup and view all the answers

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