Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 9 views

    Ch. 19B2 Voltage, Current, & Resistance - Question 2

    Uploaded by

    lon.bar.27

    Copyright:

    © All Rights Reserved
    Download as DOC, PDF, TXT or read online from Scribd

    Ch. 19B2 Voltage, Current, & Resistance - Question 2

    Uploaded by

    lon.bar.27
    9 views3 pages

    Copyright

    © © All Rights Reserved

    Available Formats

    DOC, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    Copyright:

    © All Rights Reserved
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    9 views3 pages

    Ch. 19B2 Voltage, Current, & Resistance - Question 2

    Uploaded by

    lon.bar.27

    Copyright:

    © All Rights Reserved
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    of 3

    Number Correct ______/17 Parent Signature ____

    (no credit if not graded and signed)___________________________________________________


    Mrs. Brannon Name___________________
    Physical Science Due:
    Ch. 19B2 Voltage, Current, and Resistance - questions

    Explain how each of the following work.


    1. Dry Cell Battery: _______________________________________________________
    _______________________________________________________________________
    _______________________________________________________________________

    2. Wet Cell Battery: _______________________________________________________


    _______________________________________________________________________
    _______________________________________________________________________

    3. Generator: ____________________________________________________________
    _______________________________________________________________________
    _______________________________________________________________________

    4. Photovoltaic Cells: _____________________________________________________


    _______________________________________________________________________
    _______________________________________________________________________

    5. What type of devices use dry cell batteries? __________________________________


    _______________________________________________________________________

    6. What type of devices use wet cell batteries? __________________________________


    _______________________________________________________________________

    7. What are some sources of energy that power generators? ________________________


    ________________________________________________________________________
    8-10. Create a foldable – fold a piece of paper in half and cut 2 slits- that compares
    Voltage, Current, and Resistance.
    Include definition, abbreviation, SI units, Ohm’s Law formula for each, how it is
    measured, and a comparison to flowing water in your own words
    (Staple the foldable to this when turned in for full credit.)
    Complete the following calculations using Ohm’s Law.
    Be sure to show your work, include units and use significant digits.

    ____________ 11. Using Ohm’s law, find the current through a circuit with a net
    resistance of 3.5 ohms having a potential difference of 3.0 V. (2 SDs)

    ____________ 12. A portable CD player uses one AA 1.5 V battery. When operating,
    the player uses 57 mA of current. How much electrical resistance does the CD player
    have? (don’t forget to convert to amps) (2 SDs)

    _____________ 13. The CD player is your car has an electrical resistance of 4.5 ohms.
    What battery voltage is required to supply 2.7 A of current to the CD player? (2 SDs)

    _____________14. A current of 0.50 A flows in a 60-W light bulb when the voltage
    difference between the ends of the filament is 120 V. What is the resistance of the
    filament? (2 SDs)
    (Refer to pages 462-463 for Power Calculations help.)
    Power = Work/ change in time = Voltage * Current = V I
    So power is how fast you use the electrical energy.
    (SI units for Power is Watts)

    Complete the following calculations using Power formulas (pg. 462-463).


    Be sure to show your work, include units and use significant digits.

    ________________15. What is the power of a 3.6 V cell phone battery that provides 1.5
    A current? Use the appropriate power formula found on p 221 (2 SDs)

    ________________16. What is the net resistance of a laptop computer that has a 11 V


    battery and requires 14.5 W of power? Use the appropriate power formula found on p 221
    of your textbook. (2 SDs)

    _________________17. A portable CD player uses one AA 1.5 V battery. When


    operating, the player uses 57 mA (0.057 A) of current. How much power, in milliwatts,
    does the CD player use? (2 SDs)

    You might also like