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Solve for R I=ER+rI = \frac { E } { R + r }

Question 8

Multiple Choice

Solve for r. I=ER+rI = \frac { E } { R + r }


A) r=ERr = E - R
B) r=IERIr = \frac { I E - R } { I }
C) r=EIRIr = \frac { E - I R } { I }
D) r=RIEIr = \frac { R - I E } { I }

Correct Answer:

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