A numerical problem on Drift velocity

Two conducting wires X and Y of same diameter but different materials are joined in series across a battery . if the number density of electrons in X is twice that in Y . Find the ratio of drift velocity of electrons in the two wires. (Adithya Singh asked this) Incoming search terms:i want to […]

How is doping related with depletion layer of diode?

“How is doping related with depletion layer of diode and how it increases the conductivity of semiconductor” – Nilotpal Arjun Asks Answer: As doping is increased, the width of depletion layer decreases as there will be enough electrons and holes available in a narrow region. The conductivity increases

Links for the weekend – from Physics World

DNA puts a new spin on electrons http://physicsworld.com/cws/article/news/45152 The physicist who tames lightning http://physicsworld.com/cws/article/indepth/45092 Ready, steady, cook: a fresh take on science teaching http://physicsworld.com/cws/article/multimedia/45063 Spreading the word: why science outreach matters http://physicsworld.com/cws/article/multimedia/44763