Conversion of Areas and Volumes

Chapter 1.4 Conversion of Areas and Volumes

Fundamental Electrical and Electronic Principles Third Edition Book
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Fundamental Electrical and Electronic Principles Third Edition Book

  • 4Fundamental Electrical and Electronic Principles then 25 10 5 A 250 A Ans Alternatively, 25 10 5 25 10 2 10 3 0.25 10 3 so 25 10 5 A 0.25 mA Ans (b) 3 10 4 3 10 1 10 3 or 300 10 6 so 3 10 4 W 0.3 mW or 300 W Ans (c) 850 000 850 10 3 or 0.85 10 6 so 850 000 J 850 kJ or 0.85 MJ Ans (d) 0.0016 1.6 10 3 so 0.0016 V 1.6 mV Ans 1.4 Conversion of Areas and Volumes Consider a square having sides of 1 m as shown in Fig. 1.1 . In this case each side can also be said to be 100 cm or 1000 mm. Hence the area Aenclosed could be stated as: AAA1111001001010101000100010102224233mor cmor 106 mm .21m1m Fig. 1.1 From the above it may be seen that 11011024226mcmand that mmm .2 Similarly, if the square had sides of 1 cm the area would be A110101022242cmm . Again if the sides were of length 1 mm the area would be A110101023362mmm . Thus 1 cm 2 10 4 m 2 and 1 mm 2 10 6 m 2 .