Ohms Law, Watts Law and Engineering Notation Review

1
Ohms Law, Watts Law and Engineering Notation
Review

• Convert the units below to the units indicated
• 18.74 mA _____________ A
• 0.1755 v _________ mv
• 87.35 kW _____________ W
• 0.0001267 A _________ mA
• 3450 w _____________ kw
• 1.457C _________ mC
•  270 800 J _____________ kJ
• 27 580 W _____________ kW

2
Ohms Law, Watts Law and Engineering Notation
Review-2

• Convert these numbers which are in Scientific
  Notation to the units that are indicated.
• 125 x 10-3v ________________mv  
• 562.5 x 10-7 A _______________mA
•     4.56 x 104 C ________________kC
•     22.5 x 10-6 w ___________ mw

3
Ohms Law, Watts Law and Engineering Notation
Review-3

• Identify the electrical quantity and the unit it
  is expressed or the prefix.
• I ______________ unit ________
• P ______________ unit ________
• R ______________ unit ________
• k ______________
• m _______________
• M ____________

4
Ohms Law, Watts Law and Engineering Notation
Review-4

• Solve the following problems with the data given
• R _______ P 250 mw E 24 v Formula
  __________
• E _________ P 1.60 w R 33 kW Formula
  __________
• I _________ P 1.2 kw R 12 kW Formula
  __________
• P _________ I 250 mA R 2.7 kW Formula
  __________
• E _________ P 92 mw I 4.5 mA Formula
  __________

5
Answers to PowerPoint Review

• 0.01874 A
• 175.5 mv
• 87 350 W
• 127.5 mA
• 3.450 kw
• 1457 mC
• 270.8 kJ
• 27.580 k W

6
Answers to PowerPoint Review-2

• 125 mv
• 56.25 mA
• 45.6 kC
• 22.5 mw
• I current unit amperes
• P power unit watts
• R resistance unit ohms
• k kilo or 103
• m micro or 10-6
• M mega or 106

7
Answers to PowerPoint Review-3

• R 2.304 kW E2/P
• E 229.8 v (PR) -1/2
• I 316.2 mA (P/R)-1/2
• P 168.75 w I2R
• E 20.44v P/I