High frequency inverter using irf540n
The gate signal in of 5v and at a frequency of 50kHz.

It's not going to happen with your circuit. Consider this: -

The upper MOSFETs are source followers hence they provide no voltage amplification and the source follows (clue in the name) the gate but maybe 1 or 2 or 3 volts lower. So, if the gate signal is 0 volts to 5 volts repeating, the output p-p will be a couple of volts at best.

I have constructed this full-wave bridge inverter which is to work at frequencies of 50kHz to 100Khz.

Well, you may have constructed it but no, you have not designed a H bridge. There are plenty of web designs available so I suggest you find one that uses bootstrap drivers and is capable of working at your supply voltage range.