Question

what is resistance? what are its limitations?

Answer 1

The general meaning of the resistance is to make the speed slow.

Its meaning in current and electricity is pretty much same

Like if in wire the current flows then if it has more resistance then it will have slow speed and if it has lesa resistance then it will have more speed.

Hope it helps.

Answer 2

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The use of electrical resistance as a feedback signal for positioning of shape memory based actuators is critically revised.

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A physics-based model relating electrical resistance variation with strain for a single crystal benchmark case is presented.

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Even in the simplest case, a straightforward accurate correlation between strain and electrical resistance does not exist.

•Guidelines for selection of a shape memory material for actuator positioned through the electrical resistance are formulated.Resistance is an electrical quantity that measures how the device or material reduces the electriccurrent flow through it. The resistance is measured in units of ohms (Ω). If we make an analogy to water flow in pipes, the resistance is bigger when the pipe is thinner, so the water flow is decreased.