Question

. 2 The effective mass of an electron in a semiconductor A. Can never be negative B. Can never be positive C. Can be negative or positive D. Depends on its spin​

Answer 1

Answer:

I know the answer

Explanation:

where to give the answer

Answer 2

Answer:

The correct answer is option C, that is the electron's effective mass in a semi-conductor, can never be negative or positive. Furthermore, it can be infinity, as well.

Explanation:

The effective mass is the mass which an electron experiences in effect to responding to forces or any potential. Thus, the electron's effective mass in a semiconductor is the mass in effect due to forces or potential experienced in the semiconductor.

The effective mass is calculated as a function of the band structure E(k).

For the lower portion of the E(k) curve, effective mass represented by m* is positive.

Further higher in the curve, reaching towards the point of inflection on the curve, m* becomes negative.

At the point of inflection on the curve, m* becomes infinite.