Induced Voltages and Inductance18320.18From Bvε=, the required speed is A()()( )0.500 A6.00 1.00 m s2.50 T1.20 mvΩ=AAIRBB===20.19⊥=AvG, where is the component of the magnetic field perpendicular to the velocity . Thus, B⊥() ()( )650.00T sin58.060.0 m300 m s0.763 V1−°==×20.20The speed of the beam after falling freely for 9.00 m, starting from rest , is 00yv=( )2202029.80 m s9.00 m13.3 m syyyvvay=+∆=+−−=Since the induced emf is ⊥=AB, where ⊥is the component of the magnetic field perpendicular to the velocity vG, we find ( )( )6318.010T13.3 m2.8710V2.87 mV12.0 ms−−=20.21(a) Observe that only the horizontal component, Bh , of Earth’s magnetic field is effective in exerting a vertical force on charged particles in the antenna. For the
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