An Electric Field Perpendicular to a Magnetic Field Is Used

question 68

Multiple Choice

An electric field perpendicular to a magnetic field is used as a velocity selector for Li⁺ ions, selecting the velocity v₁. Next, Li⁺⁺ ions are sent through the same velocity selector, selecting velocity v₂. If neither the electric nor magnetic fields have changed between the two processes, how do v₁ and v₂ compare?

• A) v₂ = v₁
• B) v₂ = 2 v₁
• C) v₂ = v₁/2
• D) v₂ = 4 v₁
• E) v₂ = v₁/4

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Definitions:

Control Point

A specific point or condition in a process or experiment that is used as a standard for comparison or to ensure consistency.

Change Window

A defined period during which changes are allowed or implemented in a system, process, or environment, often used in IT and project management.

True Experimental Design

Research design involving random assignment of participants to conditions and manipulation of an independent variable to determine its effect on a dependent variable.

Random Assignment

A method used in experimental designs to allocate participants to different groups in a study, ensuring each has an equal chance of being assigned to any group.