spratleyp94 spratleyp94

05-05-2017
Biology

contestada

How is an electromagnet different from a permanent magnet?

A.It has only north magnetic poles.
B.It has only south magnetic poles.
C.There is no magnetic field.
D.It can be turned on and off.

Respuesta :

amandag2 amandag2

05-05-2017

D it can be turned on & off.

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