AC Circuits?

A resistor is connected across an oscillating emf with a peak current through the resistor of 6.00 A. If the resistance R is doubled, what is the peak current?

Answer 1

If the source has zero impedance ( ie is an ideal supply)
then at any instant of time V = I r
I = v/r
as v has not altered then I is inversely proportional to r
so double r and you halve I

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