judge the equivalent resistance when 1 ohm, 10 cube ohm and 10 to the power 6 ohm are connected in parallel
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1/Rp = 1/R1+1/R2+1/R3
= 1/10 + 1/1000 + 1/1000000
= 0.1 + 0.001 + 0.000001
= 0.100101
Rp = 1/0.100101
= 9.98
= 10 ohms ( approx)
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