Examlex
Which of the following improves considerably during the elementary school years?
Relay
An electrically operated switch that uses a small electrical current to control a larger circuit.
Iron
A chemical element used primarily as a base material in steel manufacturing, known for its durability and magnetic properties.
Permeability
In physics, it's a measure of the ability of a material to support the formation of a magnetic field within itself, symbolized by the Greek letter µ.
Magnetic Lines
Imaginary lines used in models and diagrams to represent the strength and direction of a magnetic field around a magnet or an electric current.
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