A Conducting Rod Whose Length Is ℓ = 1

question 53

Multiple Choice

A conducting rod whose length is ℓ = 1.60 m is placed on frictionless U-shaped metal rails that is connected to a lightbulb having a resistance of 4.00 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 2.20 T is applied perpendicular to and out of the paper. What is the magnitude of the external applied force needed to move the rod to the right with a constant speed of 6.00 m/s?

• A)8.60 N
• B)9.30 N
• C)10.6 N
• D)12.6 N
• E)18.6 N

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Definitions:

Statesboro, Georgia

Statesboro, Georgia is a city in the southeastern United States, known for its history, cultural contributions, and as a center of education, particularly through Georgia Southern University.

Lynched

An act of aggression where a group, acting without official legal sanction, executes an individual, frequently through lynching, based on accusations of wrongdoing, regardless of whether they have been formally tried.

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Lynch Law

The practice of punishment, often by hanging, carried out by mob action without legal authority, frequently used to control or terrorize African Americans.