- #1

Tanishq Nandan

- 122

- 5

## Homework Statement

Two capacitors C1 and C2 are charged to 120V and 200V respectively.It is found that on connecting them together the potential on each one of them can be made zero.Then,

A)3C1=5C2

B)3C1 + 5C2=0

C)9C1=4C2

D)5C1=3C2

## Homework Equations

Q=CV

Q-charge on capacitor

C-capacitance

V-potential diff across plates

Capacitors in parallel have same potential difference

## The Attempt at a Solution

After charging the capacitors to their respective voltages,the charges on them are:

On C1: 120C1 and -120C1

On C2: 200C2 and -200C2

Now,when we connect them in parallel,according to question,potential across them becomes zero.

Through Q=CV,

if V=0,Q=0 as well...

So there's no charge on any capacitor

So,the total charge on them ought to be zero..i.e..120C1+200C2=0

Option B

But,the answer given is A.

I think..maybe my assumption of "connecting them together" in the question as a parallel configuration is wrong..maybe something else..