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Problem related to the electric current

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Reference no: EM131604077

Question: When an electric current passes through two resistors with resistance r1 and r2, connected in parallel, the combined resistance, R, can be calculated from the equation

(1/R) = (1/r1) + (1/r2),

Where R, r1, and r2 are positive. Assume that r2 is constant.

(a) Show that R is an increasing function of r1.

(b) Where on the interval a ≤ r1 ≤ b does R take its maximum value?

Reference no: EM131604077

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