Number of secondary electrons emitted per number of primary electrons depends on
A
Material of target
B
Frequency of primary electrons
C
Intensity
D
None of the above
[RPET 2000]
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C
Intensity
Intensity $\propto$ Number of electrons
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$P$-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 $G e$
The current in a triode at anode potential $100\ V$ and grid potential $1.2 \ V$ is $7.5\ mA$. If grid potential is changed to $-2.2\ V$, the current becomes $5.5\ mA$. the value of trans conductance $(g)$ will be