number of electrons increases while that of electrons decreases

number of holes increases while that of electrons decreases

number of holes and electrons do not change

number of holes and electrons increases equally

$$ \begin{array}{|l|l|l|} \hline \text { A } & \text { B } & \text { Y } \\ \hline 0 & 0 & 0 \\ \hline 1 & 0 & 0 \\ \hline 0 & 1 & 0 \\ \hline 1 & 1 & 0 \\ \hline \end{array} $$

$$ \begin{array}{|l|l|l|} \hline \text { A } & \text { B } & \text { Y } \\ \hline 0 & 0 & 1 \\ \hline 1 & 0 & 0 \\ \hline 0 & 1 & 0 \\ \hline 1 & 1 & 1 \\ \hline \end{array} $$

$$ \begin{array}{|c|c|c|} \hline A & B & Y \\ \hline 0 & 0 & 0 \\ \hline 1 & 0 & 1 \\ \hline 0 & 1 & 1 \\ \hline 1 & 1 & 1 \\ \hline \end{array} $$

$$ \begin{array}{|l|l|l|} \hline \mathbf{A} & \mathbf{B} & \mathbf{Y} \\ \hline 0 & 0 & 1 \\ \hline 1 & 0 & 1 \\ \hline 0 & 1 & 1 \\ \hline 1 & 1 & 1 \\ \hline \end{array} $$

fractional change in minority carriers produce higher forward current

fractional change in majority carriers produce high reverse current

fractional change in minority carriers produce higher reverse current

fractional change in majority carriers produce higher forward current

High operational voltage

Warm-up time is required

Bandwidth of light is $4000\mathop {\rm{A}}\limits^{\rm{o}}-7000 \mathop {\rm{A}}\limits^{\rm{o}}$

Fast on-off switching