A conducting helicopter blade for a R-22 helicopter has a length of 3.835 m and rotates at

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Question:

A conducting helicopter blade for a R-22 helicopter has a length of 3.835 m and rotates at 529.8 rpm in a uniform perpendicular (to the plane of the spinning blade) magnetic field of 50 ?T. Find the potential difference developed between the ends of the rotating helicopter blade.