A) \[60\text{ }cm\]
B) \[50\text{ }cm\]
C) \[40\text{ }cm\]
D) \[20\text{ }cm\]
Correct Answer: C
Solution :
In a meter bridge \[\frac{{{R}_{1}}}{{{R}_{2}}}=\frac{l}{100-l}\] \[\frac{2}{3}=\frac{l}{(100-l)}\] \[\Rightarrow \] \[200-2l=3l\] \[\Rightarrow \] \[5l=200\] \[\therefore \] \[l=40\,\,cm\]You need to login to perform this action.
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