Magnetic Field
The magnetic field is a vital concept in electromagnetism, which is the study of the interaction between electricity and magnetism. This section begins with a fundamental observation that an electric current flowing through a conductor generates a magnetic field around it. This relationship underscores the interconnectivity of electricity and magnetism.
To illustrate this, several activities are introduced, such as observing the deflection of a compass needle when placed near a current-carrying wire. This phenomenon demonstrates that magnetic fields emanate from conductive materials. The section also defines the magnetic field and its representation through field lines, emphasizing that the lines exhibit specific patterns depending on factors like current direction and distance from the wire.
Key historical figures, like Hans Christian Oersted, are discussed for their contributions to the field, including the discovery of electromagnetism. The section concludes with detailed explanations of how magnetic fields behave around different shapes of conductors, such as straight wires, circular loops, and solenoids, establishing practical applications in devices like electromagnets and understanding the dynamics of electric circuits.