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There is a current of 172 pA when a certain potential is applied across a certain...

There is a current of 172 pA when a certain potential is applied across a certain resistor. When that same potential is applied across a resistor made of the identical material but 28 times longer, the current is 0.054 pA. 1) Compare the effective diameters of the two resistors (i.e. find the ratio of the diameter of the second resistor to the diameter of the first resistor.). (Express your answer to two significant figures.)

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