Question

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

Answer 1

they are connected in parllel!!!

Answer 2

The relation between the capacitor be, 3 C1 = 5 C2.

The two capacitor charged to respective voltage is connected together so as to attain zero potential on each. The relation is thus derived by conservation of potential difference.

Given:

Voltage on one capacitor be V1 = 120 V

Voltage on other capacitor be V2 = 200 V

Thus from conservation of potential difference we have,

$\Rightarrow \mathrm{C1} \mathrm{V1}=\mathrm{C} 2 \mathrm{V} 2$

$\Rightarrow \mathrm{Cl} \text { and } \mathrm{C} 2$ not given

$\Rightarrow \mathrm{Cl} \times 120=\mathrm{C} 2 \times 200$

$\Rightarrow \frac{c 1}{c 2}=\frac{200}{120}$

$\Rightarrow \frac{C 1}{C 2}=\frac{5}{3}$

$\Rightarrow 3 \mathrm{Cl}=5 \mathrm{C} 2$