Final answer:
A magnetic field can be produced by a current-carrying wire, charged particles moving in the same direction, and by a permanent magnet. Non-connected wires, random motion of charged particles, and stationary point charges do not create a magnetic field.
Step-by-step explanation:
Select operative ways to produce a magnetic field. Check all that apply.
- With charged particles moving in random directions (not correct)
- With a current-carrying wire (correct)
- With charged particles moving in the same direction (correct)
- With a non-connected wire (not correct)
- With a fixed positive and negative point charges (not correct)
- With a permanent magnet (correct)
Creating a magnetic field can be achieved through several methods. One way is by utilizing a current-carrying wire, where the flow of electrons creates a magnetic field with concentric circles around the wire. This is described by Ampere's Law and can be visualized with the use of the right-hand rule; the direction of the current is your thumb, and your fingers show the direction of the magnetic field lines.
Another way is by having charged particles all moving in the same direction, which will similarly create a magnetic field. Lastly, a permanent magnet naturally has a magnetic field due to the alignment of magnetic moments in the material, which does not require an electrical current to exist.
Non-connected wires, random motion of charged particles, and stationary point charges, however, do not create a magnetic field.