You work as a material engineer at an aircraft development, manufacturing and maintenance company in the MENA region. Recently, the manufactured airplanes have been experiencing crashes after a couple of years in service. You have been assigned as a member in the investigation team to identify the main cause of the crashes. a) Discuss which hysteresis is better to be used with the AC generator in the airplane. b) In general, describe the structural, elasticity and electrical properties of copper and the PVC insulator (polymeric) with reference to their material properties. c) How metals and non-metals (ceramics and polymers) could be degraded?

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Maximum power transfer theorem

A resistive load will consume maximum power from a network when the load resistance is equal to the resistance of the network as viewed from the open-circuit terminals, with all energy sources removed leaving only the internal resistances. Physicist Moritz von Jacobi introduced the maximum power transfer theorem in 1940. Therefore, this theorem is also known as Jacobi's law.