In a certain temperature range, the electrical conductivity of a semiconductor increases with increase in temperature. This is because:

the carrier concentration remains constant but the mobility of carriers increases in temperature

both carrier concentration and mobility of carriers increase with increasing temperature

both carrier concentration and mobility of carriers decrease with increasing temperature

the carrier concentration increases substantially, but the mobility of carriers decreases with increase in temperature

the carrier concentration remains constant but the mobility of carriers increases in temperature

In a certain temperature range, the electrical conductivity of a semic

1.	In a certain temperature range, the electrical conductivity of a semiconductor increases with increase in temperature. This is because:
A.	both carrier concentration and mobility of carriers increase with increasing temperature
B.	both carrier concentration and mobility of carriers decrease with increasing temperature
C.	the carrier concentration increases substantially, but the mobility of carriers decreases with increase in temperature
D.	the carrier concentration remains constant but the mobility of carriers increases in temperature
Answer» D. the carrier concentration remains constant but the mobility of carriers increases in temperature

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