That could be a "solenoid".
Solenid
-- a DC power supply; (e.g., battery) -- a long conductor that can be arranged to take the current several turns around a central axis; (e.g., wire) -- a highly permeable core for the winding; (e.g., cylindrical clump of iron)
All electrical circuits produce a magnetic field around the wires when a current is travelling. If we want to generate a large field, we can coil the wire. Such a coil is called a solenoid.
The diameter of the coil affects the amount of electricity as longer the coil longer the electricity.
Solenoid is a helically wound coil of wire. If current flows through the wire then an intense magnetic field is produced along the axis of the solenoid. This magnetic field would induce magnetism in the ferro magnetic piece placed along the axis of the solenoid.
Since a coil contains numerous loops, more of the conductor is affectedÊ by the magnetic field. An increase in permeability of the core results in an increase in the inductance of the coil.
magitising
Wound. As in you wound something around (coiled), or you received a wound (an injury.)
Coiled around copper core wire, no flow blocking element. Why is this insulated wire coil not prone to short-circuit failure?
Basically like any other electric heater. There's a coil of insulated wire through which current is passed. This heats the wire which is contained within the iron and heats it. The wire may not itself be insulated. It may just be wound around a non-conducting former like mica with the coils not touching one another and unable to move so they do.
When current is passed throgh a galvanometer, the coil oscillates about its mean position before it comes to rest. To bring the coil to rest immediately, the coil is wound on a metallic frame. Now, when the coil oscillate, eddy currents are set up in the metallic frame, which opposes further oscillations of the coil. This inturn enables the coil to attain its equilibrium position almost instantly. Since the oscillation of the coil die out instantaneously, the galvanometer is called dead beat galvanometer.
the coil increases the electrical power from the battery before it is sent to the spark plug.
The correct spelling is armature (wound coil in motors and generators).
If the solenoid wire is not insulated the number of turns will be reduced by the uninsulated wires touching and shorting out the turns.
Level Wound Coils are used in various applications, including refrigeration and air conditioning systems.
An electric current flowing in a wire creates a magnetic field around the wire. To concentrate the magnetic field of a wire, in an electromagnet the wire is wound into a coil, with many turns of wire lying side by side. The magnetic field of all the turns of wire passes through the center of the coil, creating a strong magnetic field there. A coil forming the shape of a straight tube (a helix) is called a solenoid; a solenoid that is bent into a donut shape so that the ends meet is called a toroid. Much stronger magnetic fields can be produced if a "core" of ferromagnetic material, such as soft iron, is placed inside the coil. The ferromagnetic core magnifies the magnetic field to thousands of times the strength of the field of the coil alone. This is called a iron-core electromagnet.
On what vehicle with what engine?
There are a number of ways copper wire can be insulated - or has been insulated in the past - but today, the most common insulating material for copper wire (by no means the only one, though), is vinyl/plastic.