A) \[\frac{f+x}{f}\]
B) \[\frac{f}{x}\]
C) \[\sqrt{\frac{f}{x}}\]
D) \[\frac{{{f}^{2}}}{{{x}^{2}}}\]
Correct Answer: B
Solution :
\[\frac{I}{O}=\frac{f}{f-u}\,;\,\,\,where\,\,u\,=\,f+x\,\,\,\,\therefore \frac{I}{O}\,\,=\,\,-\frac{f}{x}\]You need to login to perform this action.
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