A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in _______________ electrons ?

Related Mcqs:

The leaching solvent used in Baeyer’s process for the purification of bauxite is___________________?

A. Ammonium hydroxide B. Sodium carbonate C. Sodium hydroxide D. Ammonium carbonate...

The thermodynamic law, PVy = constant, is not followed by the __________________?

A. Free expansion of an ideal gas B. Adiabatic expansion of steam in turbine C. Adiabatic compression of air D. Ideal compression of air...

In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet ?

A. Zirconia B. Alumina C. Bakelite D. Tungsten carbide...

Ammonia leakage in the refrigeration system is detected by_________________?

A. Sulphur stick, which on detection gives white smoke B. Using chemical reagents C. Its smell D. Soap solution...

All of the following alloying elements of steel increases hardness but sacrifice ductility, except________________?

A. Nickel B. Vanadium C. Molybdenum D. Chromium...