Wire Is Wound on a Square Frame, 30 Cm by 30

question 34

Multiple Choice

Wire is wound on a square frame, 30 cm by 30 cm, to form a coil of 7 turns. The frame is mounted on a horizontal shaft through its center (perpendicular to the plane of the diagram) , as shown in the figure. The coil is in clockwise rotation, with a period of 0.060 s. A uniform, horizontal, magnetic field of magnitude 0.40 T is present. At a given instant, the plane of the coil forms a 60° angle with the horizontal, as shown. At that instant, what is the magnitude of the emf induced in the coil?

• A) 13 V
• B) 23 V
• C) 2.1 V
• D) 3.6 V
• E) 26 V

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