University Physics II · Magnetic Fields and Magnetic Forces · 8.04
Velocity selectors
Crossed electric and magnetic fields, force balance, selected speed, direction, field tolerances, and device limitations.
Course-map guide · not a complete lesson or simulationScope & orientation
What this subsection covers
Crossed electric and magnetic fields, force balance, selected speed, direction, field tolerances, and device limitations.A strong response uses torque-versus-angle graphs and states where the model stops being reliable.
Reasoning checklist
Evidence, assumptions and limits
Assumptions to state
State the system, observable, approximation, and conditions held fixed before using a model.
Evidence to collect
Which electric and magnetic field settings transmit only a chosen particle velocity?
Read the complete note
Which electric and magnetic field settings transmit only a chosen particle velocity? Useful evidence includes vector equations, trajectory simulations, parameter sweeps, transmission windows, and analytic comparison.
Limits to state
This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus.
Read the complete note
This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus. Departments may redistribute weeks, laboratory hours, optics, or the modern-physics survey to match local requirements. This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus. Departments may redistribute weeks, laboratory hours, optics, or the modern-physics survey to match local requirements. Thermal physics appears as an unnumbered institutional extension: some universities assess it within Physics II, while others teach it in a separate course, so include the thermal extensions only where the local syllabus requires them. A result should be checked against units, signs, limiting cases, and the conditions under which its model was derived.
Diagram & examples
Work the claim before choosing an equation
Interactive concept map
Follow the model from claim to evidence.
Crossed electric and magnetic fields, force balance, selected speed, direction, field tolerances, and device limitations.
Model, evidence, and boundary
When should a model used for Velocity selectors be revised?
Which electric and magnetic field settings transmit only a chosen particle velocity? Useful evidence includes vector equations, trajectory simulations, parameter sweeps, transmission windows, and analytic comparison.
modelModel, evidence, and boundary turns the stated idea into a representation that can make a prediction.
Example questions
Try the reasoning before revealing the structure.
When should a model used for Velocity selectors be revised?
Quick check
Test the reasoning, not recall
When should a model used for Velocity selectors be revised?
Choose an answer to test the model.