Question

Question: Suppose some people are sitting in a row at a movie theater, with a single empty seat on the left end of the row. Every 5 minutes, a person moves into a seat on his or her left if it is empty. In what direction and with what speed does the empty seat “move” along the row? Comment on the connection with hole motion in p-type semiconductors.

Short answer

On the connection with hole motion in p-type semiconductors, the holes experience the force towards the battery terminals. The electrons are jump into the holes of the atoms and the free electrons moves towards the positive terminals. These electrons are again jump into the next available holes and the process is continue. As the process going on, it appears that holes are shifted towards the negative terminal of the battery.

Step-by-step solution

Step 1:

According to the question in every 5 minutes, a person moves into a seat on left side if the seat is empty so the speed of the empty seat is,

$\mathrm{Speed}=\frac{\mathrm{OneSteat}}{\mathrm{Minute}}$

Step 2:

On the connection with hole motion in p-type semiconductors, the holes experience the force towards the battery terminals. The electrons are jump into the holes of the atoms and the free electrons moves towards the positive terminals. These electrons are again jump into the next available holes and the process is continue. As the process going on, it appears that holes are shifted towards the negative terminal of the battery.