A 60-W Light Bulb Emits Spherical Electromagnetic Waves Uniformly in All

question 57

Multiple Choice

A 60-W light bulb emits spherical electromagnetic waves uniformly in all directions.If 50% of the power input to such a light bulb is emitted as electromagnetic radiation,what is the maximum value of the electric field at a distance of 2.0 m from the light bulb?

• A)43 V/m
• B)0.11 mV/m
• C)21 V/m
• D)60 V/m
• E)30 V/m

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Definitions:

Hippocampus

Structure of the brain involved in memory and in the stress response.

Fornix

A C-shaped bundle of nerve fibers in the brain that acts as a major output tract of the hippocampus, involved in memory formation and recall.

Perception of Provocation

The way in which an individual interprets or perceives an action or event as a challenge or threat.

Response Selection

The process of choosing among different responses or actions, often studied in cognitive psychology and neuroscience.