When an electron is displaced in a semiconductor, the hole that's left behind is

A. attracted to the negative terminal of the voltage source.
B. attracted to the anode of the voltage source.
C. incapable of carrying a charge.
D. considered and impurity in the crystal.

E. Off to find its long-lost electron buddies for a wild reunion party! Just kidding, the correct answer is A. attracted to the negative terminal of the voltage source. That hole would totally jump at the opportunity to meet up with some electrons and get reunited in an electric circuit. It's like a cosmic game of hide-and-seek! So, the hole would be drawn towards the negative terminal where the electrons flow. But don't worry, it's not considered an impurity in the crystal, it's just part of how semiconductors do their electron dance.

When an electron is displaced in a semiconductor, the hole that's left behind is:

B. attracted to the anode of the voltage source.

In a semiconductor, the movement of charge is facilitated by the movement of both electrons and holes. When an electron is displaced from its position, it creates a positively charged hole in the crystal lattice. This hole can be thought of as an absence of an electron, and it behaves as a positive charge carrier. It is attracted towards the anode (positive terminal) of the voltage source.

To determine the answer to this question, we need to understand the behavior of electrons and holes in a semiconductor.

A semiconductor is a material that has properties between those of a conductor and an insulator. In a pure semiconductor crystal, such as silicon or germanium, every atom bonds perfectly with its neighboring atoms, leaving no free charge carriers. However, when a semiconductor is doped with impurities, it can become conductive.

Now, let's consider what happens when an electron is displaced in a semiconductor.

When an electron is excited and moves from its valence band to the conduction band, it leaves an empty space behind in the valence band. This empty space is known as a hole. The hole can be thought of as a mobile positive charge carrier, even though it represents the absence of an electron.

Now, let's analyze the answer choices:

A. Attracted to the negative terminal of the voltage source: This is incorrect. In a semiconductor, the hole is not attracted to the negative terminal of the voltage source.

B. Attracted to the anode of the voltage source: This is also incorrect. The hole is not specifically attracted to the anode of the voltage source.

C. Incapable of carrying a charge: This is incorrect. Holes are capable of carrying a positive charge as they are considered mobile positive charge carriers.

D. Considered an impurity in the crystal: This is incorrect. The hole is not considered an impurity in the crystal. It is a natural consequence of the electron excitation process in a semiconductor.

Therefore, the correct answer is:

B. None of the above.