25.1. Electricity and Magnetism http://www.ck12.org
FIGURE 25.3
The right hand rule shows the direction of
the magnetic field around a wire that is
carrying electric current.Lesson Review Questions
Recall
- Define electromagnetism.
- Describe how Oersted discovered electromagnetism.
- What is the right hand rule?
Apply Concepts
- The drawing below shows part of a wire that has current flowing through it. The arrow shows the direction of
the current. Apply the right hand rule, and sketch the magnetic field lines around the wire.
Think Critically
- Relate the properties of an electric current to its magnetic field.
Points to Consider
The magnetic field created by a single wire with current flowing through it is too weak to be very useful. However,
technologies have been developed to make stronger electromagnetic fields. You can learn what they are in the next
lesson on "Using Electromagnetism."