Two parallel plate capacitors of capacity C and 3C are connected in… | JEE Main 2022 (25 Jul, Shift 2)

Q69JEE Main 2022 · 25 JUL · SHIFT 2Medium

Dielectrics

Two parallel plate capacitors of capacity C and 3C are connected in parallel combination and charged to a potential difference 18 V. The battery is then disconnected and the space between the plates of the capacitor of capacity C is completely filled with a material of dielectric constant 9. The final potential difference across the combination of capacitors will be ___________ V.

Numerical answer type. Work it out, then open the answer.

Show answer and solution

Answer: 6

Charge: $Q = (C + 3C) \times 18 = 72C$ , constant after disconnection.
New capacitance: $9C + 3C = 12C$ .
$V' = \frac{72C}{12C} = 6\text{ V}$

Report a mistake

More questions on Dielectrics

A parallel plate capacitor with width 4 cm, length 8 cm and separation between the plates…JEE Main 2022 (27 Jul, Shift 2)
An air filled parallel plate capacitor has a capacity 2 pF. The sepeartion of the plates…MHT CET 2021 (21 Sep, Shift 1)
A parallel plate capacitor filled with oil of a dielectric constant 3 between the plates…MHT CET 2021 (20 Sep, Shift 1)
When the battery across the plates of a charged condenser is disconnected and a…MHT CET 2021 (22 Sep, Shift 1)
A parallel plate capacitor has plate area 100 m2 and plate separation of 10 m. The space…JEE Main 2021 (18 Mar, Shift 1)
In a parallel plate capacitor set up, the plate area of capacitor is 2 m2 and the plates…JEE Main 2021 (16 Mar, Shift 2)
If qf is the free charge on the capacitor plates and qb is the bound charge on the…JEE Main 2021 (25 Jul, Shift 2)
A parallel plate capacitor of capacitance 200 μ F is connected to a battery of 200 V. A…JEE Main 2021 (31 Aug, Shift 2)

Dielectrics question from JEE Main 2022 (25 Jul, Shift 2)

More questions on Dielectrics