Physics for Scientists and Engineers
Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 38, Problem 55P
To determine

The type of semiconductor type and the concentration of charge carriers.

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Tin (Sn) has a superconductive critical temperature Tc = 3.7 K and critical magnetic field at T = 0 K equal to Bc = 31 mT. What is the maximum magnetic field Sn can sustain at the critical temperature without losing its superconducting state? What is the minimum radius required for an infinite linear wire of Sn if it is to carry a current of 200 A at T = 3.0 K whilst still in its superconducting state?
A hydrogen isotope separator contains positively ionized hydrogen H^1, with isotope of hydrogen, Deuterium D^2, and other heavy particles, and the ions were released in a potential difference of 200 Volts. The strong magnetic field of 1.4x10^-2 Tesla (out of the page), bends the ions and Deuterium is collected on separate ionic trap as shown in the figure. (Masses MH1=1.67x10^-27 kg, MD2 = 2* MH1, Q(H1, D2) = 1.6x10^-19 C) What are the velocities of the Deuterium when exiting the plates, in unit of 10^5 m/s?
A three-level laser emits a light of wavelength of 5500 Å. What will be the ratio of population of upper level (E2) to the lower level (E1) if the optical pumping mechanism is shut off (Assume T = 300 K)? At what temperature for the above condition the ratio of population will be half? [kB = 1.38 × 10-23 JK-1]
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