Question
The electrical conductivity of a semiconductor
increases with rise in temperature because:Solution
In a semiconductor , electrical conductivity depends on the number of free charge carriers (electrons and holes). As temperature rises, thermal energy increases , which causes more covalent bonds to break , liberating more electrons into the conduction band and creating holes in the valence band. This increase in intrinsic carrier concentration enhances conductivity. The band gap does decrease slightly with temperature, but not drastically enough to be the primary cause. The dominant mechanism is the thermal excitation of electrons across the band gap due to breaking of covalent bonds.
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
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Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
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What will come in the place of question mark?
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
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Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
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Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.
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Select the combination of letter that when sequentially placed in the blanks of the given series will complete the series.
G _ _ J K _ H I J _ G ...
Select the correct combination of the letters that when sequentially placed in the blanks of the given letter series will complete the series.
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Select the combination of letters that when placed sequentially in the blanks of the given series will complete the series.
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Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
M O_ T V _ _ R _V M _ _ T V
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