A Conducting Rod of Length ℓ= 25 Cm Is Placed $$\vec { B }$$

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 $$\vec { B }$$ field of 0.40 T in magnitude 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