Question

Tom and his group were making a poster for their classroom to depict the ways that electricity and magnetism work together. Which of the followingshould the group add to their poster?

. A. A current can move a magnet.
B. A magnet placed on a wire can stop current in a wire.
C. Magnetic fields can induce a current
D. Magnetic fields cause wires with no current to spin.
E. A current can induce a magnetic field.

Answer 1

Tom and his group should include on their poster that a current can induce a magnetic field, magnetic fields can induce a current, and a current can move a magnet, to depict the symbiotic relationship between electricity and magnetism.

Step-by-step explanation:

Tom and his group should add the following elements to their classroom poster to depict the ways that electricity and magnetism work together:

• A current can induce a magnetic field: The relationship between electricity and magnetism can be illustrated by the magnetic field created by an electric current in a wire. The magnetic field lines form concentric circles around the wire, as detailed by the right-hand rule.
• Magnetic fields can induce a current: The process of generating electromotive forces (emfs), and hence currents, with magnetic fields is known as induction or magnetic induction. This was demonstrated in 1831 by Michael Faraday and Joseph Henry, who showed that moving a magnet through a coil of wire can produce a current.
• A current can move a magnet: The force exerted by a magnetic field on a current-carrying wire, depicted by the right hand rule, can produce motion, thereby moving the wire or magnet.

These concepts illustrate the intimate relationship between electrical currents and magnetic fields, supporting Big Idea 4 of how electric and magnetic changes can occur due to interactions with other systems.