Atoms and Electrons » Exercise - 126. The electron density in conduction band is proportional to : (a) Donor concentration (b) Square of donor concentration (c) Square root of donor concentration (d) Cube root of donor concentration
Conducting Materials » Exercise - 19. The conductivity of copper is less than that of silver by : (a) 5 – 10 % (b) 50 – 60 % (c) 80 – 90 % (d) 20 – 30 %
Conducting Materials » Exercise - 13. The electrical conductivity is directly proportional to : (1) Electron density (2) Relaxation time of electrons (a) both 1 & 2 (b) only 2 (c) only 1 (d) neither 1 nor 2
Semiconductor Materials » Exercise - 254. In an N-type material, the free electrons concentration is approximately equal to : (a) The density of acceptor atoms (b) The density of the donor atoms (c) Sum of the density of acceptor and donor atoms (d) None of these