MCQ
An air filled parallel plate capacitor has capacity C. If distance between plates is doubled and it is immersed in a liquid then apacity becomes twice. Dielectric constant of the liquid is
- A1
- B2
- C3
- ✓4
✓
Answer
Correct option: D.
4
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
An initially parallel cylindrical beam travels in a medium of refractive index $\mu(I) = \mu_0 + \mu_2I $ where $μ_0$ and $μ_2$ are positive constants and $I$ is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius.
→As the beam enters the medium , it will
Displacement current is same as:
A $250-$ turn rectangular coil of length $2.1\, cm$ and width $1.25\, cm$ carries a current of $85\, \mu A$ and subjected to a magnetic field of strength $0.85\, T.$ Work done for rotating the coil by $180^o $ against the torque is .............. $\mu\ J$
→Four resistances $10$ $\Omega$, $5$ $\Omega$, $7$ $\Omega$ and $3$ $\Omega$ are connected so that they form the sides of a rectangle $AB$, $BC$, $CD$ and $DA$ respectively. Another resistance of $10$ $\Omega$ is connected across the diagonal $AC$. The equivalent resistance between $A$ and $B $ is .............. $\Omega$
→$A$ light ray is incident on a transparent sphere of index $= \sqrt 2 $ , at an angle of incidence $= 45^o$. What is the deviation of $a$ tiny fraction of the ray, which enters the sphere, undergoes two internal reflections, and then refracts out into air ?......$^o$
→Curie temperature is the temperature above which
$A$ constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if
→The electric field intensity at $P$ and $Q$, in the shown arrangement, are in the ratio
→An $AC$ source producing emf $\in=\in_{0}\Big[\cos\big(100\pi\text{s}^{-1}\big)\text{t}+\cos\big(500\pi\text{s}^{-1}\big)\text{t}\Big]$ is connected in series with a capacitor and a resistor. The steady-state current in the circuit is found to be $\text{i}=\text{i}_1\cos\Big[\big(100\pi\text{s}^{-1}\big)\text{t}+\phi_1\Big]+\text{i}_2\cos\Big[\big(500\pi\text{s}^{-1}\big)\text{t}+\phi_2\Big].$
→A charged $30\; \mu\, F$ capacitor is connected to a $27\; m\,H$ inductor. What is the angular frequency of free oscillations of the circuit?
→