A) \[K\frac{2{{\lambda }_{1}}{{\lambda }_{2}}}{{{R}^{2}}}\]
B) \[K\frac{2{{\lambda }_{1}}{{\lambda }_{2}}}{R}\]
C) \[K\frac{{{\lambda }_{1}}{{\lambda }_{2}}}{{{R}^{2}}}\]
D) \[K\frac{{{\lambda }_{1}}{{\lambda }_{2}}}{R}\]
Correct Answer: B
Solution :
Force on l length of the wire 2 is \[{{F}_{2}}=Q{{E}_{1}}=({{\lambda }_{2}}l)\frac{2k{{\lambda }_{1}}}{R}\] Þ \[\frac{{{F}_{2}}}{l}=\frac{2k{{\lambda }_{1}}{{\lambda }_{2}}}{R}\] Also \[\frac{{{F}_{1}}}{l}=\frac{{{F}_{2}}}{l}=\frac{F}{l}=\frac{2k{{\lambda }_{1}}{{\lambda }_{2}}}{R}\]You need to login to perform this action.
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