5.1.5 - 5.1.10 Electric Circuits

8 Questions | Total Attempts: 78

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Electric Quizzes & Trivia

Resistance


Questions and Answers
  • 1. 
    What is the best definition of Resistance?
    • A. 

      V/I

    • B. 

      The ability to stop a flow of current

    • C. 

      The impedence of the flow of current

    • D. 

      The PD divided by current through a component

  • 2. 
    100mA is enough to kill a person.  If a man's electrical resistance is around 1000 ohms when he gets out of the shower, what voltage would just be enough to kill him?
    • A. 

      1V

    • B. 

      10V

    • C. 

      100V

    • D. 

      240V

  • 3. 
    How would you double the resistance of a piece of wire?
    • A. 

      Warm it up

    • B. 

      Half its length

    • C. 

      Double its width

    • D. 

      Double its length

    • E. 

      Double its length AND half its width

  • 4. 
    What is Ohm's Law?
    • A. 

      V=IR, where V=Potential difference, I=current, R=resistance

    • B. 

      R=V/I where V=Potential difference, I=current, R=resistance

    • C. 

      Current is proportional to Potential difference

    • D. 

      A resistor will have a constant resistance at a fixed temperature whatever the current.

    • E. 

      A resistor has a constant resistance.

  • 5. 
    How would you describe the I/V graph of a filament lamp (I - y axis, V - x axis)?
    • A. 

      Straight line graph through the origin

    • B. 

      Straight line graph through the origin but starts to curve slightly up at end

    • C. 

      Straight line graph through the origin but starts to curve slightly down at end

    • D. 

      Straight line graph through the origin then horizontal line

    • E. 

      Straight line graph through the origin then a vertical line

  • 6. 
    What is the power required  by a 4amp  240 V applicance?
    • A. 

      0.0166666 W

    • B. 

      60W

    • C. 

      960W

    • D. 

      6KW

  • 7. 
    What does the resistivity of a resistor depend on?
    • A. 

      Its length

    • B. 

      Its width

    • C. 

      Its length and its width

    • D. 

      Its mass

    • E. 

      The material it is made of

  • 8. 
    Are there any parts of this section - resistivity, resistance, ohms law, ohmic and non-ohmic resistors that you do not understand?
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