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Stiffness refers to the resistance of an elastic body to deformation by an applied force. It is a measure of how much force is required to deform a body. In a more general context, stiffness can also describe the lack of ease or flexibility in movement, whether referring to physical objects or body parts. In engineering, stiffness is a critical property that determines the load-bearing capacity and deformation behavior of materials and structures under load.
d
Explanation: The diameter of shaft for an electrical machine is determined by
considerations of stiffness. The stiffness is the ability to withstand the weight of rotor and
unbalanced magnetic pull.