MCQ
An insulator plate is passed between the plates of a capacitor. Then, current:

  • A
    First flows from A to B and then from B to A
  • B
    First flows from B to A and then from A to B
  • C
    Always flows from B to A
  • D
    Always flows from A to B

Answer

  1. First flows from B to A and then from A to B

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

Similar questions

Which resistor is difficult to make of having a value less than about 2 Ohms?
Two resistors A and B have resistances RA and RB, respectively, and RA < RB. The resistivities of their materials are $\rho _{\text{A}}$ and $\rho_{\text{B}}.$
  1. $\rho _\text{A}>\rho _\text{B}$
  2. $\rho _\text{A}=\rho _\text{B}$
  3. $\rho _\text{A}<\rho _\text{B}$
  4. The information is not sufficient to find the relation between $\rho _\text{A}$ and $\rho _\text{B}.$
The specific resistance of a rod of copper as compared to that of thin wire of copper is:

A gamma ray photon creates an electron- positron pair. If the rest mass energy of an electron is 0.5 MeV and the total K.E. of the electron- positron pair is 0.78 MeV, then the energy of the gamma ray photon must be

(a) 0.78 MeV

(b) 1.78 MeV

(c) 1.28 MeV

(d) 0.28 MeV

Which of the following quantities related to a lens depend on the wavelength or wavelengths of the incident light?
  1. Power.
  2. Focal length.
  3. Chromatic aberration.
  4. Radii of curvature.
What is the nature of equipotential surfaces in case of a positive point charge?

The dimensions of magnetic flux are

(a)  

(b)  

(c)  

(d)  

Wave nature of light follows because

(a) Light rays travel in a straight line

(b) Light exhibits the phenomena of reflection and refraction

(c) Light exhibits the phenomenon of interference

(d) Light causes the phenomenon of photoelectric effect

The fine powder of a coloured glass is seen as

(a) Coloured

(b) White

(c) That of the glass colour

(d) Black

Which arrangement of four identical resistances should be used to draw maximum energy from a cell of voltage V

(a)

(b)

(c)

(d)