Which of the following statement is correct?
A. In conductors., the valence and conduction bonds overlap
B. Substances with energy gap of the order of 2 eV are insulators
C. The resistivity of a semiconductor increases with increase in temperature
D. The depletion layer in the pn-junction region is caused by drift of electrons
Choose the correct answer from the options below
Answer & explanation
Correct answer: option 1
* In conductors, the valence and conduction bands overlap
* (Eg) for insulators > 3 eV
* Resistivity (ρ) of semiconductor ∝ \(\frac{1}{Temperature} \) Number of free electron hole pairs increases with increase in temperature.
* Depletion layer in pn junction diode is formed due to diffusion of electrons from n-type to p-type and holes from p-type to n-type into each others region
Thus, only statement (A) is correct