Why naked wire cannot use in electromagnet

Explanation:

The wire in the windings needs to be insulated. Electricity takes the shortest path from one place to another. If the wire is bare, then adjacent turns are touching. The result is the current flows through the shortest path between the leads of the electromagnet, never flowing through a single turn of the coil.

If you found my answer useful then please mark me brainliest.

It will short between the windings; the current rather than passing around and around and around the core will just pass across the surface and create no magnetic field (which is proportional to the number of turns it takes around the core).

Explanation: If naked wire is used then the iron rod also acts as a conductor and short circuit takes place instead of showing magnetic effect of electricity to the molecules of the rod. Hence, naked wire is not used while making electromagnet.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.