A horizontal wire rod is free to slide on a vertical conducting frame as shown i

Question

A horizontal wire rod is free to slide on a vertical conducting frame as shown in the figure. The wire has mass 7 kg and length 7 m. It maintains good contact with the conducting frame. The resistance of the circuit is 4 .. A uniform magnetic field with magnitude 7 T is directed perpendicular to the frame (into the page). What is the direction of the induced current? The acceleration of gravity is 9.8 m/s2 . 1. clockwise first, then counterclockwise. 2. counterclockwise first, then clockwise. 3. clockwise. 4. counter-clockwise.

Explanation / Answer

3. clockwise

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