A 20 m-ohm ammeter is used to measure the current through a 10 ohm resistor with which it is in series.  A.) Compute the percent change in the current through this leg of the circuit, comparing the current drawn with just the resistor in the circuit with the current drawn by both elements, assuming the potential across that part stays the same.  B.) Now assume the current stays the same, calculate the percent change in the potential across this part of the circuit.

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