help:mosfet very important!

[electricano]

i came acroos a past year exam question regarding the mosfet.the question is to discuss about the high side and low side switching of a mosfet and which one is better.

what is that?i never seems this before.if anyone knows,plz answer my question

 

[Roff]

Do a Google search for "high low side switching". There should be enough info there to help your understanding.