A metal wire is subjected to a constant potential difference. When the temperature of the metal increases, the drift velocity of the electron in it _________. Fill in the blank with the correct answer from the options given below. |
increases, thermal velocity of the electrons decreases decreases, thermal velocity of the electrons decreases increases, thermal velocity of the electrons increases decreases, thermal velocity of the electrons increases |
decreases, thermal velocity of the electrons increases |
Thermal velocity will increase: It is given that the temperatures of metal wire increases. So, the KE of electron also increases, so the thermal velocity will increase. The drift velocity will decrease: Due to the increase in the number of collisions, the relaxation time τ will decrease The correct answer is Option (4) → decreases, thermal velocity of the electrons increases |