In an n-type semiconductor, the conduction-band energy is 1.1 eV and the donor energy level is 1.0 eV. At temperatures approaching 0 K the Fermi energy is equal to:
(a) 1.1 eV
(b) 1.0 eV
(c) 1.05 eV
(d) 0.55 eV
(c) 1.05 eV
You might also like to view...
Lattice points in a Bravais lattice are ______________points in space.
Fill in the blank(s) with the appropriate word(s).
A composite beam of aluminum (Ea 5 72 GPa) and steel (Es 5 190 GPa) has a width b 5 25 mm and heights ha 5 42 mm and hs 5 68 mm, respectively. A bending moment is applied about the z axis resulting in a maximum stress in the aluminum of 55 MPa. The maximum stress in the steel is approximately:
(A) 86 MPa
(B) 90 MPa
(C) 94 MPa
(D) 98 MPa
Suppose a lone asteroid happens to be passing relatively near Jupiter (but not near any of its moons), following a hyperbolic orbit as it approaches Jupiter. Which of the following statements would be true?
A) Jupiter's gravity would capture the asteroid, making it a new moon of Jupiter. B) The asteroid's orbit around Jupiter would not change, and it would go out on the same hyperbolic orbit that it came in on. C) Jupiter would probably expel the asteroid far out into the solar system. D) The asteroid would slowly spiral into Jupiter until it crashed into the atmosphere. E) Any of these scenarios is possible.
Charges of 3.5 µC and ?7.6 µC are placed at two corners of an equilateral triangle with sides of 0.1 m. At the third corner, what is the electric field magnitude created by these two charges? (ke = 8.99 × 10^9 N·m2/C2)
a. 1.2E+7 N/C b. 3.0E+6 N/C c. 5.5E+6 N/C d. 5.9E+6 N/C e. 7.9E+6 N/C