Tiny sensors in smartphone could be used to determine the position of the phone on the Earth's surface by measuring the Earth's magnetic field. A current I is applied to a slice of semiconductor as shown in Figure 1(a). Bexternal X X XX X X X XOX X Semiconductor ХXXXX Figure 1(a): without magnetic field Figure 1(b): with magnetic field After detecting magnetic field, Bexternal of 2.55 mT on the slice, the electrons collect at the top edge of the slice and the bottom edge becomes positively charged as shown in Figure 1(b). (a) Explain why the electrons collect at the top of the edge of the slice. (b) Determine the magnitude of the maximum magnetic force that could be exerted on the electron if the electron moves through the field with a speed of 5.5 × 106 m s-1. (c) What is the magnitude of the maximum acceleration of the electron? (d) Explain if the same magnitude of magnetic force exerted on a proton moving through the field with the same speed in (c).

Tiny sensors in smartphone could be used to determine the position of the phone on the Earth's surface by measuring the Earth's magnetic field. A current I is applied to a slice of semiconductor as shown in Figure 1(a). Bexternal X X XX X X X XOX X Semiconductor ХXXXX Figure 1(a): without magnetic field Figure 1(b): with magnetic field After detecting magnetic field, Bexternal of 2.55 mT on the slice, the electrons collect at the top edge of the slice and the bottom edge becomes positively charged as shown in Figure 1(b). (a) Explain why the electrons collect at the top of the edge of the slice. (b) Determine the magnitude of the maximum magnetic force that could be exerted on the electron if the electron moves through the field with a speed of 5.5 × 106 m s-1. (c) What is the magnitude of the maximum acceleration of the electron? (d) Explain if the same magnitude of magnetic force exerted on a proton moving through the field with the same speed in (c).

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter26: Electromagnetism

Section: Chapter Questions

Problem 40A

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Similar questions

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