Assuming the charge doesn't drain out with the oil, then, for the relationship Q=CV to be maintained, the voltage must rise to compensate for the loss of capacitance. My guess is the 10uF capacitor b
This simple puzzle caused more discussion in my office this morning than it had any right to. Have a ponder while waiting for next QRSS symbol to come through. Andy G4JNT -- From Circuit Cellar maga