A Conducting Rod Whose Length Is $\ell = 1.60 \mathrm {~m}$

question 345

Multiple Choice

A conducting rod whose length is $\ell = 1.60 \mathrm {~m}$ is placed on frictionless $\mathrm { U }$ -shaped metal rails that is connected to a lightbulb having a resistance of $4.00 \Omega$ as shown in the figure. The rails and the rod are in the plane of the page. A constant uniform magnetic field of strength $2.20 \mathrm {~T}$ is applied perpendicular to and out of the paper. An external applied force moves the rod to the right with a constant speed of $6.00 \mathrm {~m} / \mathrm { s }$ . At what rate is energy dissipated in the lightbulb?

• A) \(21.2 \mathrm {~W}\)
• B) \(112 \mathrm {~W}\)
• C) \(11.5 \mathrm {~W}\)
• D) \(60.0 \mathrm {~W}\)
• E) \(121 \mathrm {~W}\)

---

Definitions:

Awareness

The ability to perceive, feel, or be conscious of events, objects, or sensory patterns.

Impulse Control

The ability to resist or delay an impulse, drive, or temptation to act, relevant in the context of various psychiatric conditions.

Rationalizes

The process of justifying behaviors or decisions with plausible explanations, often to make them appear reasonable.

Social Anxiety Disorder

A mental health condition characterized by intense fear of social situations due to perceived judgments by others.