Circuits Basics

11 Questions | Total Attempts: 87

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Circuits Basics

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Questions and Answers
  • 1. 
    What is current?
    • A. 

      The flow of charges, usually in the form of electrons

    • B. 

      The newness of a battery or resistor

    • C. 

      Something that blocks or slows the flow of electrons

    • D. 

      The potential energy stored in a battery

  • 2. 
    What is the unit for current?
    • A. 

      Volts

    • B. 

      Amperes

    • C. 

      Ohms

    • D. 

      Joules

  • 3. 
    Voltage is a measurement of what?
    • A. 

      Radiant energy of a lightbulb in a circuit

    • B. 

      Kinectic energy of a motor in a circuit

    • C. 

      Potential energy stored in a battery

    • D. 

      The flow of electrons

  • 4. 
    What is the unit for voltage?
    • A. 

      Volts

    • B. 

      Amperes

    • C. 

      Ohms

    • D. 

      Joules

  • 5. 
    What is the unit for resistance?
    • A. 

      Volts

    • B. 

      Amperes

    • C. 

      Ohms

    • D. 

      Joules

  • 6. 
    What is the unit for energy?
    • A. 

      Volts

    • B. 

      Amperes

    • C. 

      Ohms

    • D. 

      Joules

  • 7. 
    Which of these is the equation for Ohm's Law?
    • A. 

      W = Fd

    • B. 

      V = IR

    • C. 

      R = IV

    • D. 

      PE = mgh

  • 8. 
    What is shown in this picture?
    • A. 

      Resistors connected in parallel

    • B. 

      Batteries connected in parallel

    • C. 

      Resistors connected in series

    • D. 

      Batteries connected in series

  • 9. 
    Why can birds sit on a power line?
    • A. 

      Because birds have minimal resistance compared to household electronics, so current is diverted to the houses instead

    • B. 

      Because the wire is in the air and air has infinite resistance so no current flows through the wire

    • C. 

      Because birds' feet are insulated so current is not conducted through them

    • D. 

      Because both feet are on the same voltage line, so there is no potential difference, so current does not flow through the bird

  • 10. 
    What if a bird sat on a power line that was very close to the ground, placing one foot on the wire and one foot on the ground?
    • A. 

      No current would flow through the bird, so nothing would happen

    • B. 

      The bird would experience a voltage difference between the wire and the ground and would get fried

    • C. 

      The bird's feet are insulated, so it doesn't matter what it touches

  • 11. 
    A certain steam iron carries a current of 6.4 A when connected to a 120 V source.  What is the resistance of the steam iron?
    • A. 

      1.875 Ω

    • B. 

      0.05 Ω

    • C. 

      768 Ω

    • D. 

      18.75 Ω