Ap-n step junction in si has 1018 cm-3 net acceptors on the p side and 1014 cm-3 net donors on the n side. assume t = 300k, ni = 1.5 x 1010cm-3, find (a) the built-in potential and (b) extent of depletion region on n and p side. (c) explain how the built-in potential is related to the fermi level and what happens to vbi as a function of temperature in the range 30k to 500k.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Examine the nuclear reacti why is this classified as a nuclear reaction rather than a chemical reaction? it is not balanced. a new compound is formed. a change has occurred in a nucleus. a new element has been formed.

Positrons are spontaneously emitted from the nuclei of