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# A capacitor of capacitance is filled with two dielectrics of dielectric constant 4 and 6. What is the new capacitance?

- 10
- 5
- 4
- 7

## The correct answer is: 5

### Initially, the capacitance of capacitor

…(i)

When it is filled with dielectric of dielectric constant as shown, then there are two capacitors connected is parallel. So,

(as area becomes half)

Using Eq. (i), we obtain

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