Which of the Following Statements Is True About Semiconductors

Multiple Choice

Which of the following statements is true about semiconductors?

A) Pure silicon and germanium are called intrinsic semiconductors.
B) In extrinsic semiconductors,the number of electrons in the conduction band is determined by the temperature and the magnitude of the band gap.
C) Dopants are present in intrinsic semiconductors.
D) The conductivity of intrinsic semiconductors is controlled by adding small numbers of different atoms.
E) The types of intrinsic semiconductors include p-type and n-type semiconductors.