Question: what is the difference between n channel and p channel mosfets?
Answer: In an N-channel MOSFET, the source is connected to ground, the drain to the load, and the FET will turn on when a positive voltage is applied to the gate. ... This means that if you want to use a P-channel mosfet to switch voltages higher than 5V, you'll need another transistor (of some sort) to turn it on and off.