A Conducting Rod Whose Length Is ℓ = 27 $\vec { B }$

question 43

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 $\vec { B }$ magnetic field 1.20 T in magnitude is applied perpendicular to and out of the paper.An external force exerted on the rod 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

---

Definitions:

Oxidized

Pertains to a process where a substance loses electrons or gains oxygen, often resulting in a change in physical and chemical properties.

FAD

Flavin adenine dinucleotide, a redox cofactor involved in several important reactions in metabolism. FAD can exist in a reduced (FADH2) and an oxidized state (FAD).

Hydrogen Atoms

The simplest and most abundant type of atom in the universe, consisting of one proton and one electron.

ATP To ADP

The process by which adenosine triphosphate (ATP) releases a phosphate group to become adenosine diphosphate (ADP), releasing energy for cellular activities.