21. I When a thin 12.0 cm iron rod moves with a constant velocity of 4.50 m/s perpendicular to the rod in the direction shown in Figure 21.560, the induced emf across its ends is measured to be 0.450 V. (a) What is the magnitude of the magnetic field? (b) Which point is at a higher potential, a or b? (c) If the rod is rotated clockwise by 90° in the plane of the paper, but keeps the same velocity, what is the potential difference induced across its ends? Figure 21.56 Problem 210 X X b B K a X

21. I When a thin 12.0 cm iron rod moves with a constant velocity of 4.50 m/s perpendicular to the rod in the direction shown in Figure 21.560, the induced emf across its ends is measured to be 0.450 V. (a) What is the magnitude of the magnetic field? (b) Which point is at a higher potential, a or b? (c) If the rod is rotated clockwise by 90° in the plane of the paper, but keeps the same velocity, what is the potential difference induced across its ends? Figure 21.56 Problem 210 X X b B K a X

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A generator has a 460-turn coil that is 10 cm long and 12 cm wide. The coil rotates at 9.0 rotations per second in a 0.10-T magnitude B→ field. A)Determine the generator's peak voltage.
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2. A flat, circular coil has radius 10.0 cm and 200 turns. It is immersed in a uniform magnetic field that makes an angle of 60.0 degrees with the plane of the coil as shown below. The magnetic field is increasing with time at a rate of 12.0 T/s. What is the magnitude of the emf induced in the coil (in V)? (A) 65.3 (B) 100 (C) 133 (D) 76.8 (E) 49.8 (F) 30.0 Fee
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1. An AC generator has 85 rectangular loops on its armature. Each loop is 11 cm long and 8 cm wide. The armature rotates at 1500 rpm about an axis parallel to the long side. If the loop rotates in a uniform magnetic field of 0.8 T, which is perpendicular to the axis of rotation, what will be the maximum output voltage of this generator? Volts