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A fixed resistor of unknown value and a variable resistor are connected in series with a $12 \text{ volt}$ battery (no internal resistance). Two voltmeters are connected to monitor the potential difference across each resistor. A graph displays the voltage readings for the fixed resistor and the variable resistor values from $0-100 \text{ ohms}$.

Use the graph to determine the value of the fixed resistor.

A

$6.0\text{ ohms}$

B

$12\text{ ohms}$

C

$33\text{ ohms}$

D

$200\text{ ohms}$

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