1) If we add impurity to a metal those atoms also deflect electrons, therefore A) the electrical and thermal conductivites both increases B) the electrical and thermal conductivites both decreases C) the electrical conductivity increases but thermal conductivity decreases D) the electrical conductivity decreases but thermal conductivity increases Answer: Option BExplanation:If the number of electrons increases, their number of collision, increasing the thermal and electrical resistance So, electrical and thermal conductivities both decrease
