A) 4 cm
B) 10 cm
C) \[\frac{25}{9}\]cm
D) 9 cm
Correct Answer: C
Solution :
\[m={{m}_{o}}\times {{m}_{e}}\]\[\Rightarrow m={{m}_{o}}\times \left( 1+\frac{D}{{{f}_{e}}} \right)\] \[\Rightarrow 100=10\times \left( 1+\frac{25}{{{f}_{e}}} \right)\]\[\Rightarrow {{f}_{e}}=\frac{25}{9}\ cm\]You need to login to perform this action.
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