A Solid Nonconducting Sphere of Radius R Carries a Charge

question 20

Multiple Choice

A solid nonconducting sphere of radius R carries a charge Q distributed uniformly throughout its volume.At a certain distance r₁ (r₁ < R) from the center of the sphere,the electric field has magnitude E.If the same charge Q were distributed uniformly throughout a sphere of radius 2R,the magnitude of the electric field at the same distance r₁ from the center would be equal to

• A) E/8.
• B) E/2.
• C) 2E.
• D) 8E.
• E) E.

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Definitions:

Phytochrome

A photoreceptor in plants that absorbs light primarily in the red and far-red regions, thereby regulating various aspects of growth and development.

Cryptochrome

A class of flavoproteins that are sensitive to blue light and have roles in the circadian rhythms of plants and animals.

Circadian Rhythm

A natural, internal process that regulates the sleep-wake cycle and repeats on each rotation of the Earth roughly every 24 hours.

Thigmomorphogenesis

The growth and developmental changes in plants that result from mechanical stimulation or touch.