Question

name: date: changing fields we see evidence of fields changing when we place compasses near a moving magnet, or near a coil of wire attached to a generator. fields help to explain how energy can transfer when objects are not touching. there are three kinds of fields in physics that transfer energy between objects: gravitational fields, electrical fields, and magnetic fields. which fields do you think might be involved when energy transfers in an electric circuit? near the magnets in a generator, we can detect magnetic fields. when we turn the generator shaft, the fields will change. they may change magnitude by getting stronger or weaker, or they may change direction. a changing magnetic field will always change an electric field, and a changing electric field will always change a magnetic field. copper wire is made of atoms. atoms have a positively charged nucleus in the center and negatively charged particles called electrons at certain distances out from that center. the nucleus pulls on the electrons, keeping them close to the atom. however, in copper atoms, the pull on the outer electrons is pretty weak, and electrons can pass from atom to atom. this means that electrons can move through copper wherever they are pushed. electric fields push charged particles, so changing the electric field inside a copper wire can cause a flow of electrons. we call this flow of electron particles electric current. when electric current flows, energy is usually lost as it heats up the surroundings, but how much energy is lost depends on many different factors. energy can be transferred within a wire in a few different ways, including: a. a battery or moving magnet transfers energy to moving electrons. b. moving electrons transfer energy to other electrons. c. moving electrons transfer energy to atoms of a wire, heating them up. details on situations a - c: energy can be transferred within a wire when: a. a battery or moving magnet transfers energy to moving electrons. b. moving electrons transfer energy to other electrons. c. moving electrons transfer energy to atoms of a wire, heating them up. a) a battery keeps a constant difference in electrical energy across its two ends (also called “terminals”).a battery has a + positive terminal

Explanation:

In an electric - circuit, an electric field is involved as it pushes charged particles (electrons) to create an electric current. A changing magnetic field can also be involved as in a generator, a changing magnetic field induces an electric field. So both electrical and magnetic fields are involved in energy transfer in an electric circuit.

Answer:

Electrical and magnetic fields.