The copper wire and bulb is connected in a series with 220 V electric supply. Why only an electric bulb glows where as the coppe
1 answer:
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Answer:
Explanation:
In order to answer this problem you have to know the depth of the column, we say R, this information is important because allows you to compute some harmonic of the tube. With this information you can compute the depth of the colum of air, by taking tino account that the new depth is R-L.
To find the fundamental mode you use:
n: mode of the sound
vs: sound speed
L: length of the column of air in the tube.
A) The fundamental mode id obtained for n=1:
B) For the 3rd harmonic you have:
C) For the 2nd harmonic:
To find the electron and hole concentrations and fermi levels in silicon at 300 k for boron, fermi level is 9.3 x .
Ionization energy for boron in Si, 0.045 eV
Fermi level in silicon,
300 K at (Boron atoms)
All boron impurities are ionized, 300K
Electron, hole concentrations and Fermi levels is found out,
The value of Na =
np =
np =
np= 9.3 x
Fermi level is calculated,
Ef - Ev = kT ln(NV/ND)
value of kT = 0.0259 eV (300° K)
So, substitution the values
Ef - Ev = kT ln(NV/ND)
Ef - Ev = 0.0259ln (2.66 x )
Ef - Ev = 0.0259ln (26600)
Ef - Ev = 0.0259 x 10.18
Ef - Ev = 0.263 eV
What is ionization energy?
Ionization energy, also known as ionization energy (IE) or ionization energy (British English spelling), is the minimal amount of energy needed to free the most loosely bonded electron from an isolated gaseous atom, positive ion, or molecule in physics and chemistry.
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