Physics · 2026
JEE Main · 21 January 2026, Shift 1 · Q35
A parallel plate capacitor has capacitance C, when there is vacuum within the parallel plates. A sheet having thickness (1/3)^rd of the separation…
A parallel plate capacitor has capacitance $\displaystyle C$, when there is vacuum within the parallel plates. A sheet having thickness $\displaystyle \left(\frac{1}{3}\right)^{\mathrm{rd}}$ of the separation between the plates and relative permittivity $\displaystyle K$ is introduced between the plates. The new capacitance of the system is:
Official answer
From NTA’s final answer key for this paper.
(3)
$\displaystyle \frac{3 K C}{2 K+1}$
More from Capacitors
- Under steady state condition the potential difference across the capacitor in the circuit is ____ V.2026
- The stored charge in the capacitor in steady state of the following circuit is ____ μ C.2026
- A parallel plate air capacitor has a capacitance C. When it is half filled as show in figure with a dielectric constant K=5, the percentage increase…2026
- A parallel plate air capacitor is connected to a battery. The plates are pulled apart at uniform speed v. If x is the separation between the plates…2026
- From the circuit given below, the capacitance between terminals A and B shown in the circuit is ____ μ F. (. take C_1=C_2=C_3=1 μ F and C_4=2 μ F. )2026
- A parallel plate capacitor is having separation between plates 0.885 mm. It has a capacitance of 1 μ F when the space between the plates is filled…2026
- A sphere of capacitance 100 pF is charged to a potential of 100 V. Another identical uncharged metal sphere is brought in contact with the charged…2026
JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.