Smart learn2

Questions 1. When a p-n junction is under reverse bias mode, the width of the depletion region will be increased. Which of the following statements is true? A. The applied voltage moves the electrons from n-type region to p-type region. B. The applied voltage moves the holes from p-type region to n-type region. C. The applied voltage drives the electrons towards n-type region. D. The applied voltage drives the holes towards n-type region. Explanation: Under reverse bias mode, the electrons in the n-region are pulled away from the depletion region, leaving more immobile positive ions in the region. In other words, the electrons are driven towards the n-region. Answer is C 2. Which statement about conduction of electricity in semiconductors is correct? A. The presence of impurities in a semiconductor is used to decrease its resistance. B. In a semiconductor, there is a large energy gap between the conduction and valence bands. C. At low temperatures, free electrons are found both in the ...