Download App

Electrostatic Potential and Capacitance — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectrostatic Potential and Capacitance1 Mark
Question
The potential difference between the two plates of a parallel plate capacitor is constant. When air between the plates is replaced by dielectric material, the electric field intensity:
✓

Answer

Decreases
In general capacitance of parallel plate capacitor is given by:
$\text{C}=\frac{\text{K}\epsilon_0\text{A}}{\text{d}}$
Where $C$ is capacitance $, k$ is relative permittivity of dielectric material $, ϵ_{0​}$ is permittivity of free space constant, $A$ is area of plates and d is distance between them.
Therefore, the capacitance of parallel plates is increased by the insertion of a dielectric material.
Further, the capacitance is inversely proportional to the electric field between the plates, and hence the presence of the dielectric decreases the effective electric field.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electrostatic Potential and Capacitance→Electrostatic Potential and Capacitance — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Two coils have a mutual inductance $0.005 H$. The current changes in the first coil according to equation $I = I _0 \sin$
$\Omega t$, where $I _0=10 A$ and $\omega=100 \pi rad s ^{-1}$. The maximum value of emf in the second coil is
→
A person who is at rest as the charge moves by him will measure.
→
The ________ drawn at any point on the magnetic lines of force gives direction of magnetic field at that point.
→
A soap bubble is given negative charge, its radius will:
→
The dimension of $\frac{1}{2} \varepsilon_0 E^2$ where $\varepsilon_0$ is the permittivity of free space and $E$ is the electric field, is
→
A coil with $100$ turns has an inductance of $0.05H$ and $0.02A$ current is passed through it. Flux linked with the coil is
→
Which of the following is an electromagnetic wave?
→
In a diffraction pattern by a wire, on increasing diameter of wire, fringe width(a) Decreases(b) Increases(c) Remains unchanged(d) Increasing or decreasing will depend on wavelength
 
 
 
 
→
Assertion  :  A double convex lens $(m = 1.5)$ has focal length $10 \ cm.$ When the lens is immersed in water $(m = 4/3)$ its focal length becomes $40 \ cm.$
Reason      : $\frac{1}{f}=\frac{\mu_1-\mu_m}{\mu_m}\left(\frac{1}{R_1}-\frac{1}{R_2}\right)$ 
→
The moment of inertia of a uniform semicircular wire of mass M and radius r about a line perpendicular to the plane of the wire through the centre is:
  1. $\text{Mr}^2$
  2. $\frac{1}{2}\text{Mr}^2$
  3. $\frac{1}4{}\text{Mr}^2$
  4. $\frac{2}{5}\text{Mr}^2$
→