A) \[{{10}^{-1}}:1\]
B) \[{{10}^{-2}}:1\]
C) \[{{10}^{-3}}:1\]
D) \[{{10}^{-4}}:1\]
Correct Answer: D
Solution :
Approximate resistance of\[p-n\]junction in forward bias,\[{{R}_{f}}={{10}^{2}}\Omega \] Approximate resistance of\[p-n\]junction in reverse bias,\[{{R}_{r}}={{10}^{6}}\Omega \] \[\therefore \] \[\frac{{{R}_{f}}}{{{R}_{r}}}=\frac{{{10}^{2}}}{{{10}^{6}}}=\frac{{{10}^{-4}}}{1}\] \[\Rightarrow \] \[{{R}_{f}}:{{R}_{r}}={{10}^{-4}}:1\]
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