Wrapping the copper wire around an iron nail, increasing the current.   Increase the power going through the wire or have more wire wrapped around the metal object. So in â¦ the case of a nail with wire wrapped around it, the more wraps you do the stronger the electromagnet will be.
Porcupines are a type of rodent found in two main regions of the world, so scientists group them into either Old World or New World porcupines.
Porcupine (Erethizon dorsatum) Quick Facts Porcupines can NOT throw their quills. Porcupine vision is poor, but they have an excellent sense of smell. Porcupines make shrill screeches, whines, and low grunts.