The concentration of impurities in a transistor is

Statement 1: Doping concentration is maximum in emitter in transistor. Statement 2: Maximum number of electrons flows from emitter to base in n-p-n transistor.

Froth floatation process is used to concentrate impurities of the ore is ____

Benefication of the ore can be done by different ways. It is increasing the concentration of ore by removing impurities, while refining is the process by which concentration of metal is incresed in the final product. The liqation process is applicable for: