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50. A bar of conducting metal moves with speed v
in a uniform magnetic field B. In which of the
following situations will a difference in electrical
potential exist between end 1 and end 2 of the bar?
(A) x
2
B (into page)
(B)
x ty x
B (into page)
(C)
B (into page)
(D)
B
(E)
В

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