Parallel resonant induction heater

I implemented a parallel LC induction heater using theory. I made a simple square wave Inverter providing a frequency of 20kHz to the tuned LC circuit. The problem I'm facing is that my tank is not drawing any current although the tank is at resonance with the supply. The picture of the output wave across the coil wrt ground is attached. Should I attach a resistance in parallel to the tank? I don't have any resistance in parallel to that. The picture of the circuit is also attached.

EDIT:

@Marla - I have a variable dc power supply with a built-in ammeter and voltmeter. It has a max rating of 30V at 15A. So, that's where I'm measuring the current. The scope is stating the wrong frequency due to switching harmonics (stays constant at 20.2kHz then fluctuates then goes back to 20.2kHz). The switching frequency of Mosfets is 20.2kHz. Component values => L=1.9uH ; C=33uF; fsw=20.2kHz.

• Component values? Also your scope says 10 kHz. How do you measure current? You said tank isn't drawing current. Edit this into you question. Commented Jan 15, 2019 at 18:34
• Also, what load do you have in coil? Photographs will help. Commented Jan 15, 2019 at 18:36
• @Marla - the load was the tip of cast iron pliers. The inner dia of the coil is around 2.5inches and its an 8SWG copper wire wound into a 7 turn coil to give 1.9uH inductance. Commented Jan 15, 2019 at 18:59
• Have you confirmed that both the left side of coil and right side of coil are being switched? Commented Jan 15, 2019 at 19:51
• Yes. Otherwise it wouldn't go in negative polarity. Commented Jan 15, 2019 at 19:57