An Electron Moves in a Region Where the Magnetic Field

question 71

Multiple Choice

An electron moves in a region where the magnetic field is uniform, has a magnitude of 60 μT, and points in the positive x direction. At t = 0 the electron has a velocity that has an x component of 30 km/s, a y component of 40 km/s, and a z component of zero. What is the radius of the resulting helical path?

• A) 4.7 mm
• B) 18 mm
• C) 3.8 mm
• D) 2.8 mm
• E) 5.7 mm

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Definitions:

Legal Barriers

Restrictions established by law or regulation that control how businesses operate, often to limit competition or protect consumers.

Short Run

In economics, a period in which at least one factor of production is fixed, allowing for limited adjustments to changes in demand or supply.

Long Run

A period in economics where all resources and inputs can be fully adjusted or changed, contrasting with the short run where some are fixed.

Marginal Revenue

The revenue uplift experienced by selling an additional unit of a product or service.