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Science content standards for California public schools : kindergarten through grade twelve (PDF). Sacramento, Calif.: Dept. of Education. ISBN 978-0-8011-1496-0; Eisenkraft, Arthur (2010). Active physics : a project-based inquiry approach (3rd ed.). Armonk, NY: It's About Time. ISBN 978-1607200000.
The electric field is defined as a vector field that associates to each point in space the force per unit of charge exerted on an infinitesimal test charge at rest at that point. [2] [3] [4] The SI unit for the electric field is the volt per meter (V/m), which is equal to the newton per coulomb (N/C). [5]
The third thing to note, and something that is not immediately obvious, is that the electric potential changes instantly everywhere in response to a change in conditions in one locality. For instance, if a charge is moved in New York at 1 pm local time, then a hypothetical observer in Australia who could measure the electric potential directly ...
The electric field was formally defined as the force exerted per unit charge, but the concept of potential allows for a more useful and equivalent definition: the electric field is the local gradient of the electric potential. Usually expressed in volts per metre, the vector direction of the field is the line of greatest slope of potential, and ...
Representation of the electric field vector of a wave of circularly polarized electromagnetic radiation. The electromagnetic force is the second strongest of the four known fundamental forces and has unlimited range. [17] All other forces, known as non-fundamental forces. [18] (e.g., friction, contact forces) are derived from the four ...
Continuous charge distribution. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal nÌ‚, d is the dipole moment between two point charges, the volume density of these is the polarization density P.
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