How does an electric generator work? The axle rotates the armature in the magnetic field of a permanent magnet, which induces an electric current. The armature rotates the axle in the magnetic field of a permanent magnet, which induces an electric current. The axle rotates the armature in the magnetic field of an electromagnet, which induces an electric current. The armature rotates the axle in the magnetic field of an electromagnet, which induces an electric current.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

this could be newton#'s law of cooling. the cooling curve is exponential

1 is a answer of a question

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.