The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the
A
Variation of scattering mechanism with temperature
B
Crystal structure
C
Variation of the number of charge carriers with temperature
D
Type of bon
[AIEEE 2003]
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C
Variation of the number of charge carriers with temperature
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The amplification factor of a triode is $20.$ If the grid potential is reduced by $0.2$ volt then to keep the plate current constant its plate voltage is to be increased by