When the Power Supply is at 500KHZ. The voltage across the capacitor blue is higher then the voltage across the inductor green. The circuit is more capacitive because 500 KHZ is below the tuned freq of 850 KHZ. See how inductor voltage green leads the current orange by 90 degrees. See how the capacitor voltage blue lags the current orange by 90 degrees. The current is like 500 uA, so it stops the lower frequencies.
