Which are the types of carrier movements and how are they activated

Drift - As a result of an electric field

Diffusion - As a result of a carrier gradient, by other words a difference in the carrier level from one side to the other, usually when we have a p-n junction

JA

Related Physics A Level answers

All answers ▸

In an electric propulsion system, alpha particles are accelerated through a potential difference of 100kV at an average rate of 10^20 alpha particles per second. Calculate the average thrust the system can provide.


People A and B are taking a lift of mass 500 kg which has constant acceleration and the force from the rope that pulls it is 7500 N. The scales where the people stand show a reading of 720 N and 500 N.


Why is the refractive index of water bigger than that of air?


What is gravitational potential and how can gravitational potential energy be used to estimate the escape velocity of a planet of mass m and radius r?