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 _______________________?

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