Electronic Devices Question 242
Question: The Bohr radius of the fifth electron of phosphorus (atomic number = 15) acting as dopant in silicon (relative dielectric constant = 12) is
Options:
A) 10.6 Å
B) 0.53 Å
C) 21.2 Å
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
$ r _{n}={\varepsilon _{r}}( \frac{n^{2}}{Z} )a _{o}=12\times \frac{(5^{2})}{15}\times 0.53 $ = 10.6 Å.
