The conductivity of an extrinsic semiconductor with temperature________________?

A. decreases
B. increases
C. remains constant

Which of the following material is not a semiconductor ?
A. Silica B. Germanium C. Selenium D. Gallium-arsenide...
Which of the following is a semiconductor material ?
A. Phosphorous B. Rubber C. Silicon D. Aluminium...
Selenium is __________ semiconductor?
A. extrnisic B. intmisic C. N-type D. P-type...
The conductivity of a conductor can be increased by_______________?
A. decreasing its temperature B. increasing its temperature C. decreasing its vibration D. increasing its vibration...
Which of the following variety of copper has the best conductivity ?
A. Induction hardened copper B. Hard drawn copper C. Pure annealed copper D. Copper containing traces of silicon...
Super conductivity can be destroyed by_____________?
A. adding impurities B. reducing temperatures C. application of magnetic field D. any of the above...
The conductivity of a metal is determined by____________?
A. the electronic concentration and the mobility of the free electrons B. the number of valence electrons per atom C. either (A) or (B) D. none of the above...
The converse of hardness is known as______________?
A. malleability B. toughness C. softness D. none of the above...
__________ is the main constituent of glass?
A. Fe203 B. Si02 C. AI2O3 D. B2O3...
Steel wire is used as____________?
A. overhead telephone wire B. earth wire C. core wire of ACSR D. all of the above...