25.07.2016 Views

Electronic Circuit Analysis

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

APPENDIX-7<br />

Unit Conversion Factors<br />

The following factors may be used for conversion between non-SI units and SI units.<br />

To Convert To Multiply By<br />

Area Units<br />

acres square meters (m 2 ) 4047<br />

acres hectares (ha) 0.4047<br />

circular mils square meters (m 2 ) 5.067 x 10- 10<br />

square feet square meters (m 2 ) 0.0909<br />

square inches square centimeters (cm 2 ) 6.452<br />

square miles hectares (ha) 259<br />

square miles square kilometers (km 2 ) 2.59<br />

square yards square meters (m 2 ) 0.8361<br />

Electric- and Magnetic Units<br />

amperes/inch amperes/meter (Aim) 39.37<br />

gauses teslas (T) 10-4<br />

gilberts ampere (turns) (A) 0.7958<br />

lines/sq. inch teslas (T) 1.55 x 10- 5<br />

Maxwells webers (Wb) 10--8<br />

mhos Siemens(S) 1<br />

Oersteds amperes/meter 79.577<<br />

Energy and Work Units<br />

Btu joules(J) 1054.8<br />

Btu kilowatt-hours (kWh) 2.928 x 10-4<br />

ergs joules (J) 10- 7<br />

ergs kilowatt-hours (kWh) 0.2778 x 10- 13<br />

foot-pounds joules (J) 1.356<br />

foot-pounds kilogram meters (kgm) 0.1383

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!