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.
Example Sentences for porcupine. 1  Continuing his journey, the porcupine passed under a fallen tree. 2  The Canadian porcupine is also known as the cawquaw or urson. 3  When a dog or any other foe comes to close quarters, the porcupine wheels round and rapidly charges back.