In Fig. 28-57, the two ends of a U-shaped wire of mass m 10.0 g and length L 20.0 cm are
Chapter 28, Problem 88(choose chapter or problem)
In Fig. 28-57, the two ends of a U-shaped wire of mass m 10.0 g and length L 20.0 cm are immersed in mercury (which is a conductor).The wire is in a uniform field of magnitude B 0.100 T. A switch (unshown) is rapidly closed and then reopened, sending a pulse of current through the wire, which causes the wire to jump upward. If jump height h 3.00 m, how much charge was in the pulse? Assume that the duration of the pulse is much less than the time of flight. Consider the definition of impulse (Eq. 9-30) and its relationship with momentum (Eq. 9-31). Also consider the relationship between charge and current (Eq. 26-2).BimHgL Figure 28-57 88.
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