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70 ohms and 30 ohms in parallel have a combined effective resistance of

( 1/70 + 1/30 )-1 = (70 x 30)/(70 + 30) = 2100/100 = 21 ohms

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2012-04-03 18:59:22
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Q: What is the resistance of 70ohms and 30 ohms in a parallel circuit?
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