I'm a Level 1 user. Can I destroy L2 resonators with L1 XMP bursters?
A L2 resonator is 1500 XM.
A L1 burster can make at most 150 XM damage (if you're exactly on the resonator as mentioned by BanditoBunny).
You will need at least 10 bursters to destroy 1 L2 resonator.
Here you will find the different levels of bursters and resonators.