Question

three register of 7 on 15 ohm and 28 ohm are connected in series and parallel find out the equivalent resistance in both cases​

Answer 1

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Answer 2

Answer:

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Explanation:

$in \: parallel \: \\ \\ \frac{1}{r} = \frac{1}{7} + \frac{1}{15} + \frac{1}{28} \\ \\ \\ r = \frac{140}{31} \: ohm \\ \\ \\ \\ in \: series \\ \\ r = 7 + 15 + 28 = 50 \: ohm$