Advertisements
Advertisements
प्रश्न
The energy required by an electron to jump the forbidden band in silicon at room temperature is about ______.
पर्याय
0.01 eV
0.05 eV
0.7 eV
1.1 eV
Advertisements
उत्तर
The energy required by an electron to jump the forbidden band in silicon at room temperature is about 1.1 eV.
Explanation:
For pure Si, the band gap or forbidden gap is 1.1 eV. An electron must therefore have this much energy to jump the forbidden band in Si at room temperature.
APPEARS IN
संबंधित प्रश्न
Distinguish between a metal and an insulator on the basis of energy band diagrams ?
We have valence electrons and conduction electrons in a semiconductor. Do we also have 'valence holes' and 'conduction holes'?
In a semiconductor,
(a) there are no free electrons at 0 K
(b) there are no free electrons at any temperature
(c) the number of free electrons increases with temperature
(d) the number of free electrons is less than that in a conductor.
Calculate the number of states per cubic metre of sodium in 3s band. The density of sodium is 1013 kgm−3. How many of them are empty?
The product of the hole concentration and the conduction electron concentration turns out to be independent of the amount of any impurity doped. The concentration of conduction electrons in germanium is 6 × 1019 per cubic metref conduction electrons increases to 2 × 1023 per cubic metre. Find the concentration of the holes in the doped germanium.. When some phosphorus impurity is doped into a germanium sample, the concentration o
A window air conditioner is placed on a table inside a well-insulated apartment, plugged in and turned on. What happens to the average temperature of the apartment?
For germanium crystal, the forbidden gas energy gap
The reaction between α and β parameter of a transistor is given by
Which one of the following elements will require the highest energy to take out an electron from them?
Pb, Ge, C and Si
With reference to semiconductor physics, answer the following question.
In which material “Forbidden band” is absent?
