A Conducting Rod of Length ℓ= 25 Cm Is Placed

question 50

Multiple Choice

A conducting rod of length ℓ= 25 cm is placed on a U-shaped metal wire that is connected to a lightbulb having a resistance of 8.0 Ω, as shown in the figure. The wire and the rod are in the plane of the page. A constant uniform magnetic field of strength 0.40 T is applied perpendicular to and into the paper. An applied external force pulls the rod to the right with a constant speed of 6.0 m/s. What is the magnitude of the emf induced in the rod?

• A) 0.20 V
• B) 0.30 V
• C) 0.40 V
• D) 0.50 V
• E) 0.60 V

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