AP EAMCET Engineering 20 Apr 2019 Shift 1 Paper

The expression for energy stored in the capacitor is given as
U=

1

2

Q2

C

As, energy is equally distributed in electric field and magnetic field so, the energy stored in the capacitor is half of maximum.

1

2

×

1

2

Q2

C

=

1

2

×

Q′2

C

1

4

Q2

C

=

1

2

×

Q′2

C

Q′=

Q

√2