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Electrical Machines, 2nd Edition by Smarajit Ghosh

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Appendix A

Basic Definition, Hysteresis and Eddy Current Losses

A.1 RESISTANCE AND RESISTIVITY

Resistance is the property of a substance due to which it opposes the flow of current through it. The unit of resistance is ohm (Ω).

A conductor shown in Figure A.1 is taken length = l m and area of cross-section = a m2.

If R is its resistance, we have

Rl when a is constant.

Rimages when l is constant.

Rimages when both l and a are not constant.

images

Figure A.1 ...

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