A) \[25\mu \,A\,and\,3.5\,V\]
B) \[20\mu \,A\,and\,3.5\,V\,\]
C) \[25\mu A\,and\,2.8\,V\]
D) \[20\mu A\,and\,2.8\,V\]
Correct Answer: A
Solution :
| When switched on: |
| \[{{V}_{CE}}=0\] |
| \[{{V}_{CC}}-{{R}_{C}}{{I}_{C}}=0\] |
| \[{{i}_{C}}=\frac{{{V}_{CC}}}{{{R}_{C}}}=5\times {{10}^{-3}}A\] |
| \[{{i}_{C}}=B{{i}_{B}}\] |
| \[\Rightarrow \] \[{{i}_{B}}=25\mu A\] |
| \[\Rightarrow \] \[{{V}_{BB}}={{i}_{B}}{{R}_{B}}-{{V}_{BE}}=0\] |
| \[\Rightarrow \] \[{{V}_{BB}}={{V}_{BE}}+{{i}_{B}}{{R}_{B}}=3.5V.\] |
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