Unformatted text preview: v parallel to a long, straight wire carrying a steady current I as shown in Figure P 31 : 61 . The axis of the rod is maintained perpendicular to the wire with the near end at a distance r away as shown in Figure P 31 : 61 . Show that jEj = & Iv 2 ± ln & 1 + ‘ r ± is the magnitude of the emf induced in the rod. 4. Serway & Jewett Problem 31 : 66 . A thin 30 :-cm wire is held parallel to and 80 : cm above an in²nitely long, thin, straight wire carrying 200 A and resting on the horizontal ³oor. See Figure P 31 : 66 . The short wire is released from rest at time t = 0 and subsequently free falls, remaining parallel to the current-carrying wire as it descends. (a) Derive an equation for the emf induced in the short wire. Express your result as a function of the fall time t . (b) What is the minimum value of the induced emf? (c) What is the maximum value? (d) What is the induced emf : 300 s after release? 1...
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- Spring '09
- Electromotive Force, Inductor, Electromagnetic spectrum, Jewett Problem