Physics Instructional Guide

Electromagnetism

Physics

Quarter 4

McGraw Hill Module 21

● The source of the feld whether it is two point charges in the system and their initial positions and velocities (limited to one dimension), dipole magnets, or current-bearing wires. ● The nature of the interaction (electric or magnetic) between the source and the feld. ● The relative magnitude and the direction of the feld and its source. ● Representation of a feld as a quantity that has a magnitude and direction at all points in space and which contains energy. Develop a quantitative model based on evidence to illustrate the changes in the feld as distance from the source changes including: ● The source of the feld whether it is two point charges in the system and their initial positions and velocities (limited to one dimension), dipose magnets, or current-bearing wires. ● The nature of the interaction (electric or magnetic) between the source and the feld. ● The relative magnitude and the direction of the feld and its source. ● Representation of a feld as a quantity that has a magnitude and direction at all points in space and which contains energy. Relationships Students identify the following relationships between components of the given model, including: ● the changes in the feld of the objects, given the initial and fnal positions and velocities of the objects. ● The relationship between felds and distance. If position changes, so will the feld. ● The relationship between felds and forces. If the feld changes, then so will the associated force. ● The relationship between felds and potential energy. If the feld changes, then so will the associated potential energy. Connections Students use the model to: ● determine whether the energy stored in the feld increased, decreased, or remained the same as distance from the source changes. ● support the claim that the change in the energy stored in the feld (which is qualitatively determined to be either positive, negative, or zero) is consistent with the change in energy of the objects. ● Describe the cause and effect relationships on a qualitative level between forces produced by electric or magnetic felds and the change of energy of the objects in the system. ● Support the claim that felds will force objects in the direction that results in the lowest potential energy.

Standard 4.4 Asking Questions Addressing phenomena of the natural world or scientifc theories

Students evaluate the given questions in terms of whether or not answers to the questions would: ● Provide examples of features associated with digital transmission and storage of information. For example ○ can be stored reliably without degradation over time