Question

Electromagnets are made from coils of wire wrapped around a ferromagnetic object. A current flows through the wire from a power source, such as a battery. The current generates a magnetic field. Describe how you know which direction the current is flowing and what the resulting magnetic field will look like.

Answer 1

Step-by-step explanation:

You can find it by pointing your right thumb in the direction of the current in the wire and curling your fingers. You fingers will be curled in the same direction as the magnetic field around the wire.

Answer 2

There are many advantages of electromagnets over bar magnets but one of the primary advantages is that magnetic field can be turned on and off and if multiple electromagnets are used then the power of the magnetic field in an electromagnet can also be controlled.

Like advantages, there are multiple disadvantages of electromagnet but one of the major disadvantages is that it requires current to operate so it takes a lot of energy and heats up very fast