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How is electricity passed through a wire?

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Answer :

Inside a wire there is a conductor like aluminium or copper which allows flow of electrons means current flows through it. And outside of conducting material is covered with insulating material like plastic, which is use for safety purpose.
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Yes extactly

Answer :

Before electricity is passed through a wire it must have a source that is where emf comes along. EMF pushes the electricity through a conducting wire like copper or aluminimum that allows current to flow easily.
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Answer :

A  wire contains  mobile  electrons  as  majority  charge  carriers  and  holes  as minority  charge carriers when  an emf  or   potential  diffrence is  provided , electrons  flow  in opposite  direction  with  holes(convection current  flow)

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