1) What is the direction of the particle motion that makes up the diffusion current in an isolated p - n junction?

Electrons diffuse from the n material to the p material, and holes diffuse in the opposite direction.

Both electrons and holes diffuse from the p material to the n material.

Both electrons and holes diffuse from the n material to the p material.

Electrons diffuse from the p material to the n material, and holes diffuse in the opposite direction.

2) Which is true?

In p -type material, the electrons are the majority carriers.

In n -type material, the holes are the majority carriers.

In p -type material, the holes are the majority carriers.