At zero Kelvin, there is no thermal agitation and therefore no electrons from valence band are able to shift to conduction band.
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Which is the wrong statement in following sentences? A device in which $P$ and $N$-type semiconductors are used is more useful then a vacuum type because
$P$-type semiconductor is formed whenA. As impurity is mixed in $S i$B. $A$ Impurity is mixed in $S i$C. $B$ impurity is mixed in $G e$D. $P$ impurity is mixed in $G e$
Plate resistance of two triode valves is $2 k \Omega$ and $4 k \Omega$, amplification factor of each of the valves is $40.$ The ratio of voltage amplification, when used with $4 k \Omega$ load resistance, will be
For a transistor, the current amplification factor is $0.8.$ The transistor is connected in common emitter configuration. The change in the collector current when the base current changes by 6 $m A$ is