15. (a) We seek the electrostatic field established by the separation of charges (brought on by the magnetic force). With Eq. 28-10, we define the magnitude of the electric field as ( )( )||| |20.0 m/s 0.030 T0.600 V/mEvB===GG. Its direction may be inferred from Figure 28-8; its direction is opposite to that defined by
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