Electrical Circuit Analysis and Theorems Quiz
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Questions and Answers

What is the expression for the efficiency of an electric circuit when maximum power is transferred to the load?

  • Efficiency = 50%
  • Efficiency = 100%
  • Efficiency = $ rac{r}{R+r} $ (correct)
  • Efficiency = $ rac{R}{R+r} $

    • What happens to the efficiency of the electric circuit when the load resistance increases?

  • Efficiency becomes negative
  • Efficiency remains unchanged
  • Efficiency decreases (correct)
  • Efficiency increases

    • How does the efficiency of an electric circuit change with an increase in the total resistance of the circuit?

  • Efficiency increases (correct)
  • Efficiency becomes negative
  • Efficiency remains unchanged
  • Efficiency decreases

    • In the context of an electric circuit, what does a higher efficiency indicate?

    <p>Less power loss in the circuit</p> Signup and view all the answers

    Which theorem states that any linear circuit containing several sources and resistances can be replaced by a single voltage source and a single series resistance?

    <p>Norton's theorem</p> Signup and view all the answers

    What is the rule used to relate current flow at a junction in an electrical circuit?

    <p>Kirchhoff's current law</p> Signup and view all the answers

    What is the formula to calculate the Thevenin voltage of a circuit?

    <p>$V_{th} = V_{oc} - I_{sc}R_{th}$</p> Signup and view all the answers

    What does the Maximum Power Transfer Theorem state for a DC source?

    <p>The power is maximized when the load resistance equals the source resistance</p> Signup and view all the answers

    In the context of electric circuits, which theorem allows any linear circuit with multiple sources and resistances to be replaced by a single voltage source and a single series resistance?

    <p>Thevenin's theorem</p> Signup and view all the answers

    What is the expression for the efficiency of an electric circuit when maximum power is transferred to the load?

    <p>$rac{R_L}{R_L + R_{int}}$</p> Signup and view all the answers

    What does Joule's law describe in the context of electric circuits?

    <p>The dissipation of energy as heat in a resistor</p> Signup and view all the answers

    What does Kirchhoff's current law state regarding the flow of current at a junction in an electrical circuit?

    <p>The total current flowing into a junction is equal to the total current flowing out of the junction</p> Signup and view all the answers

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