A Conducting Rod Whose Length Is $\ell = 27.0 \mathrm {~cm}$

question 130

Multiple Choice

A conducting rod whose length is $\ell = 27.0 \mathrm {~cm}$ is placed on frictionless $U$ -shaped metal rails that is connected to a lightbulb having a resistance of $5.00 \Omega$ as shown in the figure. The rails and the rod are in the plane of the page. A constant uniform magnetic field of strength $1.20 \mathrm {~T}$ is applied perpendicular to and out of the paper. An external applied force moves the rod to the right with a constant speed. At what speed should the rod be pulled so that the lightbulb will consume energy at a rate of $1.10 \mathrm {~W}$ ?

• A) \(4.26 \mathrm {~m} / \mathrm { s }\)
• B) \(3.50 \mathrm {~m} / \mathrm { s }\)
• C) \(7.24 \mathrm {~m} / \mathrm { s }\)
• D) \(6.00 \mathrm {~m} / \mathrm { s }\)
• E) \(2.00 \mathrm {~m} / \mathrm { s }\)

Know the statistics related to health behaviors and outcomes in the United States.

Understand the concept of risk perception in relation to health-impairing habits.

Recognize the links between diet, exercise, and health.

Learn about the genetic and environmental influences on weight and obesity.

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Definitions:

Psychological Assessment

A process by which professionals use a variety of tools and techniques to understand a person's behavior, personality, and capabilities.

Reliability

The extent to which a measurement instrument yields reliable and steady outcomes across different periods.

Validity

The degree to which an idea, conclusion, or measurement is based on solid grounds and accurately reflects the reality.

Cognitive-behavioural Assessment

Evaluation process that examines thought and behavior patterns to address psychological issues.