A Conducting Rod Whose Length Is ℓ = 27

question 48

Multiple Choice

A conducting rod whose length is ℓ = 27.0 cm is placed on frictionless U-shaped metal rails that is connected to a lightbulb having a resistance of 5.00 Ω 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 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 W?

• A)2.00 m/s
• B)3.50 m/s
• C)4.26 m/s
• D)6.00 m/s
• E)7.24 m/s

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Definitions:

Collectivist

A cultural or societal framework that emphasizes the interdependence of individuals within their communities and values the needs and goals of the group over those of the individual.

Melting Pot

A metaphor for a society where many different types of people blend together as one.

Group

A number of individuals or things that are located, gathered, or classed together, often working towards common goals.

Clay Object

An item or artifact made from clay, shaped and often hardened by heat, used in various artistic and practical applications.