Electrical Current
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Questions and Answers

According to Ohm's law, which equation correctly represents the relationship between voltage, current, and resistance?

  • R = V/I
  • V = IR (correct)
  • R = IV
  • I = V/R

    • What is the definition of current?

  • The resistance of a conductor
  • The rate at which charge flows through a conductor (correct)
  • The power dissipated in a circuit
  • The voltage across a conductor

    • How is the resistance of a wire affected if its length is doubled, assuming all other factors remain constant?

  • The resistance remains the same
  • The resistance becomes half
  • The resistance doubles
  • The resistance quadruples (correct)

    • What is the power dissipation in a circuit with a resistance of 10 ohms and a current of 2 amperes?

    <p>20 watts</p> Signup and view all the answers

    How is the power dissipation in a circuit affected if the resistance is doubled, assuming the current remains constant?

    <p>The power dissipation becomes half</p> Signup and view all the answers

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