A square wire loop 3.0 m on a side is perpendicular to a uniform 2.0-T magnetic field. A 6-V lightbulb is in series with the loop, as shown in Fig. 27.38. The magnetic field is reduced steadily to zero over time At. (a) Find At such that the bulb will shine at full brightness. (b) Which way will the loop current flow?
A square wire loop 3.0 m on a side is perpendicular to a uniform 2.0-T magnetic field. A 6-V lightbulb is in series with the loop, as shown in Fig. 27.38. The magnetic field is reduced steadily to zero over time At. (a) Find At such that the bulb will shine at full brightness. (b) Which way will the loop current flow?
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Transcribed Image Text:37. A square wire loop 3.0 m on a side is perpendicular to a uniform
2.0-T magnetic field. A 6-V lightbulb is in series with the loop,
as shown in Fig. 27.38. The magnetic field is reduced steadily to
zero over time At. (a) Find At such that the bulb will shine at full
brightness. (b) Which way will the loop current flow?
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FIGURE 27.38 Problem 37
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