Ordinary electric current is the flow of electrons through a wire conductor (see electricity).
Alpha rays have the least penetrating power, move at a slower velocity than the other types, and are deflected slightly by a magnetic field in a direction that indicates a positive charge.
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The radiation produced during radioactivity is predominantly of three types, designated as alpha, beta, and gamma rays.
These types differ in velocity, in the way in which they are affected by a magnetic field, and in their ability to penetrate or pass through matter.