9) Which of the following statements is correct? A) The increase in electrical conductivity of a semiconductor is due to an increase in the mean free time between collisions. B) The conductivity of a semiconductor is temperature dependent since increasing the temperature increase the number of electron-hole pairs. C) The conductivity of a semiconductor increases with temperature because of greater number of electrons and holes moving in the same direction under an applied field. D) The conductivity of most metals decrease with temperature since more electron-hole pairs are created with decreasing temperature.

9) Which of the following statements is correct? A) The increase in electrical conductivity of a semiconductor is due to an increase in the mean free time between collisions. B) The conductivity of a semiconductor is temperature dependent since increasing the temperature increase the number of electron-hole pairs. C) The conductivity of a semiconductor increases with temperature because of greater number of electrons and holes moving in the same direction under an applied field. D) The conductivity of most metals decrease with temperature since more electron-hole pairs are created with decreasing temperature.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter29: Solid-state Electronics

Section29.1: Conduction In Solids

Problem 24SSC

See similar textbooks

Similar questions

Estimate the fraction of Si atoms that must be replaced by As atoms in order to form an impurity band.
The base current of a transistor is 4.4 A, and its current gain 1126. What is the collector current?
An experiment is performed to demonstrate the Hall effect. A thin rectangular strip of semiconductor with width 10 cm and length 30 cm is attached to a battery and immersed in a 1.50-T field perpendicular to its surface. This produced a Hall voltage of 12 V. What is the drift velocity of the charge earners?
Measurements of a superconductor's critical magnetic field (in T) at various temperatures (in K) are given below. Use a line of best fit to determine Bc(0). Assume Tc = 9.3 K.
What impact does an increasing magnetic field have on the critical temperature of a semiconductor?
Why are some materials semiconductors?
The Hall effect is demonstrated in the laboratory. A thin rectangular strip of semiconductor with width 5 cm and cross-sectional area 2 mm" is attached to a battery and immersed in a field perpendicular to its surface. The Hall voltage reads 12.5 V and the measured drift velocity is 50 m. s. What is the magnetic field?
What kind of semiconductor is produced if silicon is doped with (a) phosphorus, and (b) indium?
A p-n diode has a reverse saturation current 1.44108A . It is forward biased so that it has a current of 6.78101A moving through it. What bias voltage is being applied if the temperature is 300 K?
Determine the Fermi energies for (a) Mg, (b) Na, and (c) Zn.
List five main characteristics of ionic crystals that result from their high dissociation energy.
A valence electron in a crystal absorbs a photon of wavelength, =0.300nm . This is just enough energy to allow the electron to jump from the valence band to the conduction band. What is the size of the energy gap?