2. A silicon specimen is doped with 4.73 x1010/cm³ Antimony and 3.57x1010/cm³ Aluminum. a) Calculate free electron and hole #/cm³ concentrations. b) Determine specimen conductivity type (n or p).

semiconductors

Consider four of semiconductor samples: solid A is orange, solid B is black, solid C is white, and solid D is yellow. Given their colors, rank these semiconductors in order of increasing band gap. A. B < A < D < c B. B < D < A < C C. C < D < A < B D. C < A < D < B

1.) Which type of semiconductor material has been doped such that the majority of its current carriers are holes? a. None of these b. P-Type Semiconductors c. Q-Type Semiconductors d. N-Type Semiconductors   2.) The outer shell of an atom can hold up to a maximum of x electrons? What is x? a. 5 b. 2 c. 4 d. 8   3.) Which device has one PN junction: a. None of these b. Resistors c. Transistors d. Diodes