Electrostatics Question 532
Question: Four condensers each of capacity $ 4\mu F $ are connected . $ V _{P}-V _{Q}=15volts $ . The energy stored in the system is [CPMT 1976, 89]
Options:
A) $ 2400\ ergs $
B) $ 1800\ ergs $
C) $ 3600\ ergs $
D) $ 5400\ ergs $
Show Answer
Answer:
Correct Answer: B
Solution:
Total capacitance of given system $ C _{eq}=\frac{8}{5}\mu F $
$ U=\frac{1}{2}C _{eq}V^{2}=\frac{1}{2}\times \frac{8}{5}\times {{10}^{-6}}\times 225=180\times {{10}^{-6}}J $
$ =180\times {{10}^{-6}}\times 10^{7}erg=1800erg $
