A generator needs to produce 4 A of peak (maximum) current in order to power a device. The generator has a resistance of 12 2. If the generator consists of 400 square loops that have sides of 5 cm, located inside a magnetic field of 0.15 T, then at what frequency should it be rotated to produce the desired current? O250 Hz O 190 Hz

A generator needs to produce 4 A of peak (maximum) current in order to power a device. The generator has a resistance of 12 2. If the generator consists of 400 square loops that have sides of 5 cm, located inside a magnetic field of 0.15 T, then at what frequency should it be rotated to produce the desired current? O250 Hz O 190 Hz

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter23: Faraday’s Law And Inductance

Section: Chapter Questions

Problem 17OQ

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A metal bar of length 25 cm is placed perpendicular to a uniform magnetic field of strength 3 T. (a) Determine the induced emf between the ends of the rod when it is not moving, (b) Determine the emf when the rod is moving perpendicular to its Length and magnetic field with a speed of 50 cm/s.
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Using an electromagnetic flowmeter (Fig. P19.69), a heart surgeon monitors the flow rate of blood through an artery. Electrodes A and B make contact with the outer surface of the blood vessel, which has interior diameter 3.00 mm. (a) For a magnetic field magnitude of 0.040 0 T, a potential difference of 160 V appears between the electrodes. Calculate the speed of the blood. (b) Verify that electrode A is positive, as shown. Does the sign of the emf depend on whether the mobile ions in the blood are predominantly positively or negatively charged? Explain. Figure P19.69
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