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(C) In a semiconductor,the number of charge carriers (electrons and holes) increases exponentially with an increase in temperature because more covale

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increase.

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(C) In a semiconductor,the number of charge carriers (electrons and holes) increases exponentially with an increase in temperature because more covalent bonds are broken,releasing more charge carriers. As the number of charge carriers increases,the electrical conductivity of the semiconductor increases,which leads to a decrease in its electrical resistance. According to Ohm's law,$I = V/R$. Since the voltage $V$ remains constant and the resistance $R$ decreases,the current $I$ in the circuit will increase.

$A$ piece of semiconductor is connected in series in an electric circuit. On increasing the temperature,the current in the circuit will

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