An Electron Beam Travels Counterclockwise in a Circle of Radius

question 56

Multiple Choice

An electron beam travels counterclockwise in a circle of radius R in the magnetic field produced by the Helmholtz coils as shown. If you increase the current in the Helmholtz coils, the electron beam will

• A) increase its radius.
• B) decrease its radius.
• C) maintain the same radius.
• D) reverse and travel clockwise with the same radius.
• E) reverse and travel clockwise with a larger radius.

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Definitions:

Orrorin

An early hominin genus dating back to about 6 million years ago, speculated to be among the first bipedal primates.

Ardipithecus

One of the earliest genera of bipeds that lived in eastern Africa. Ardipithecus is actually divided into two species, the older of which dates to between 5.2 and 5.8 million years ago, and the younger, A. ramidus, dated to around 4.4 million years ago.

Spinal Column

The flexible longitudinal column made of a series of bones called vertebrae, which houses the spinal cord and provides structural support to the body.

Adult Human

An individual who has reached a mature stage of growth and development, typically considered to begin after adolescence.