> >easier. If you can leave positive connected to the load and switch the
> >negative, that is even easier. If you answered yes to all three then you
>
>         Hmmm...Why switching the negative is easier???

        Mostly because in the MOS world nmos is smaller and cheaper for the same
current flow (because of the higher mobility of n doped silicon IIRC),
similarly in the BJT world. TTYL

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