Q.

The energy stored in the capacitor as shown in the figure (a) is 4.5 x 10-4J. If the battery is replaced by another capacitor of 900 pF as shown in figure (b), then the total energy of system is

Question Image

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

2.25 x 10-6J

b

9 x 10-6 J

c

4.5 x 10-6J

d

Zero

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Ei=1Q22C=4.5×106J
  Q=CV=900×1012×100=9×108C In fig (b) Ceq. =2C=2×900 pFEf=12Q2Ceq=Q22×2C         =12×4.5×106=2.25×106J

Watch 3-min video & get full concept clarity
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon