A Conducting Rod Whose Length Is ℓ = 25 Cm

question 99

Multiple Choice

A conducting rod whose length is 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 out of the paper. An external applied force moves the rod to the left with a constant speed of 12 m/s. What are the magnitude and direction of the induced current in the circuit?

• A) 150 mA clockwise
• B) 150 mA counterclockwise
• C) 34 mA counterclockwise
• D) 34 mA clockwise
• E) 100 mA clockwise

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