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19. First we write Φ B = BA cos θ . We note that the angular position θ of the rotating coil is measured from some reference line or plane, and we are implicitly making such a choice by writing the magnetic ﬂux as BA cos θ (as opposed to, say, BA sin θ ). Since the coil is rotating steadily, θ increases linearly with time. Thus, θ = ωt if θ is understood to be in radians (here, ω =2 πf is the angular velocity of the coil in radians per second, and
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.
- Fall '08