A) 0.6 mm
B) 3.6 m
C) 1.2 mm
D) 12 m
Correct Answer: B
Solution :
Energy stored in the capacitor is used in lifting the mass. \[\therefore \] \[mgh=\frac{1}{2}C{{V}^{2}}\] \[50\times 9.8\times h=1\times 100\times {{10}^{-6}}\times {{(6\times {{10}^{3}})}^{2}}\] \[50\times 9.8\times h=\frac{1}{2}\times 100\times {{10}^{-6}}\times 36\times {{10}^{6}}\] \[\therefore \] \[h=\frac{1800}{50\times 9.8}=3.6\,m\]
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