Can I link l298N dual h bridge to a electromagnet if yes then please help me
Topic split into a new thread for you:
Sure, wire the electromagnet up in place of the motor on page 6.
L298N.pdf (599 KB)
With that chip.
Tell us more about the project and the 272 electromagnets (voltage/current).
There might be other solutions.
Do you have digital (on/off) coils or analog ones (-100% to +100%)?
Which bus type (SPI, I2C...) do you want to use to address every single electromagnet?