The diagram depicts a potentiometer and a fixed resistor linked across a $12\,\text{V}$ battery with negligible internal resistance. The fixed resistor and the potentiometer both have resistance $20\,\Omega$. The circuit is intended to give a variable output voltage. What is the range of output voltages?
- A$0\text{-}6\,\text{V}$
- B$0\text{-}12\,\text{V}$
- C$6\text{-}12\,\text{V}$
- D$12\text{-}20\,\text{V}$