Practice portal › Semiconductor Electronics › Intrinsic and Extrinsic Semiconductors
Asked in CBSE AIPMT 1999 · Doping and carrier concentration
Idea: a hole is not a particle but a vacancy in the covalent bonding of the crystal.
When an electron is missing from a bond, a neighbouring bonding electron can move in to fill it.
That leaves the vacancy where the neighbour came from, so the vacancy itself appears to travel.
A missing electron therefore behaves as a mobile positive charge, and that is what is called a hole.
Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.
Practise this with a timer