Consider the induced emf being generated in Figure 22.4.
Chapter 22, Problem 22.5(choose chapter or problem)
Consider the induced emf being generated in Figure 22.4. Suppose that the length of the rod is reduced by a factor of four. For the induced emf to be the same, what should be done? (a) Without changing the speed of the rod, increase the strength of the magnetic field by a factor of four. (b) Without changing the magnetic field, increase the speed of the rod by a factor of four. (c) Increase both the speed of the rod and the strength of the magnetic field by a factor of two. (d) All of the previous three methods may be used.
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