AP EAMCET Engineering 21 Sep 2020 Shift 1 Paper

Potential difference across terminals of battery, V=100VEquivalent capacitance of series combination is given as
‌

1

C

=‌

1

C1

+‌

1

C2

=‌

1

4

+‌

1

8

=‌

2+1

8

⇒‌‌‌

1

C

=‌

3

8

⇒C=‌

8

3

µF
Same charge will be flow in series combination which is given as
q=CV=‌

8

3

×10−6×100
=‌

8

3

×10−4C
∴ Energy stored, E=‌

1

2

‌

q2

C

=‌

1

2

×‌

( 8 3 ×10−4)2

8 3 ×10−6

=‌

4

3

×10−2
⇒E=1.33×10−2J