If mobility of electron is 𝑢_𝑒and mobility of hole is 𝑢_ℎ then

Explanation:

The mobility of a charge carrier in a semiconductor material is a measure of how quickly the carrier can move through the material when subjected to an electric field. It is typically denoted as μ.

Electrons and holes are the two types of charge carriers in a semiconductor. Electrons are negatively charged particles, while holes are the absence of an electron in the semiconductor lattice, effectively acting as positively charged particles.

In most semiconductor materials, the mobility of electrons (μ_e) is higher than the mobility of holes (μ_h). This is because electrons, being smaller and lighter particles, can move more easily through the crystal lattice compared to the relatively larger and heavier holes.

Thus, we generally have μ_e > μ_h.

∴ The correct answer is option 2.