Ohm's law exercises and problems

  1. A resistance of 10 W is placed across a 9 V battery. What current flows through the battery?
    Using Ohm’s Law, 

    V = IR
    9 = I (10)
    I = 0.9 A
     
  2.  a.   A resistor has a conductance of  0.100 S. What is its resistance?
      R = 1/G = 1/0.100 = 10 W

    b.   What voltage is needed to cause a 500 mA current to flow through the circuit?

    500 mA = 0.500 A
    V = IR
    V = 0.500(10) = 5 V
     
  3. What is the overall resistance of a CD portable player if it is operated by a 3 V battery and 0.75 A flow through its circuitry?

    V = IR

    3 = 0.75(R)

    R = 4.0  W.
  4. What two letters are interchangeably used to denote Voltage?
     
    _______________________ and ________________________
  5. What letters are used to denote Current and Resistance?
     
    _____________________ and _______________________
  6. Current is expressed in __________________________?
  7. Resistance is expressed in _______________________?

External Links:

www.jfinternational.com/ph/ohms-law-exercises.html

www.grc.nasa.gov/WWW/K-12/Sample_Projects/Ohms_Law/ohmslaw.html

www.physics.uoguelph.ca/tutorials/ohm/Q.ohm.example.ohm.html

www.quia.com/jq/84444.html

sun4.vaniercollege.qc.ca/cgi-bin/em/ofmt

sawaal.ibibo.com/search/Ohms-Law

www.tutorvista.com/content/science/science-ii/electricity/question-answers.php

www.code-electrical.com/ohm%27s-law/

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