Roman Black <fastvid@EZY.NET.AU> wrote:
> But if the field collapsing into an open circuit produces 250v, wouldn't
> forcing it to collapse quicker by using a reverse current source cause
> this back-emf voltage to spike even higher?? And doesn't that mean the
> reverse current source must have a voltage greater than 250v to have an
> effect?

Exactly right. dI/dt = V/L no matter how you cut it.

-- Dave Tweed

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