Question
An air filled parallel plate capacitor has capacity C. If distance between plates is doubled and it is immersed in a liquid then capacity becomes twice. Dielectric constant of the liquid is(a) 1 (b) 2(c) 3(d) 4
✓
Answer
(d) 4
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Charge on an $\alpha - \text{particle}$ is:
→An electron is moving in a circular orbit of radius R with an angular acceleration $\alpha$ At the center of the orbit is kept a conducting loop of radius r, (r<
→Three charges $Q(+q)$ and $(+q)$ are placed at the vertices of an equilateral triangle of side $l$ as shown in the figure. If the net electrostatic energy of the system is zero, then $Q$ is equal to
→Energy bands in solids are a consequence of(a) Ohm’s Law(b) Pauli’s exclusion principle(c) Bohr’s theory(d) Heisenberg’s uncertainty principle
A plano-convex lens is made of refractive index of 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is(a) 400 cm(b) 200 cm(c) 100 cm(d) 50 cm
A coil of wire of resistance 50Ω is embedded in a block of ice. If a potential difference of 210 V is applied across the coil, the amount of ice melted per second will be(a) 4.12 gm(b) 4.12 kg(c) 3.68 kg(d) 2.625 gm
A hydrogen atom in ground state absorbs $10.2eV$ of energy. The orbital angular momentum of the electron is increased by:
→A current carrying loop is placed in a uniform magnetic field in four different orientations$\text{, I,II, III IV}$ arrange them in the decreasing order of potential Energy
$(a)$
$(b)$ 
$(c)$ 
$(d)$ 
→$(a)$
$(b)$ $(c)$ $(d)$ Stopping potential for photoelectrons(a) Does not depend on the frequency of the incident light(b) Does not depend upon the nature of the cathode material(c) Depends on both the frequency of the incident light and nature of the cathode material(d) Depends upon the intensity of the incident light
In the given figure, which of the diodes are forward biased ?
1.
2.
3. 
4. 
5.
1.
2.3. 4. 5.