Question
Explain ac voltage applied on a capacitor.Explain charging and discharging of a capacitor.

Answer

SELF

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

An unsymmetrical double convex thin lens forms the image of a point object on its axis. Will the position of the image change if the lens is reversed?
Ajit had a high tension tower erected on his farm land. He kept complaining to the authorities to remove it as it was occupying a large portion of his land. His uncle, who was a teacher, explained to him the need for erecting these towers for efficient transmission of power. As Ajit realised its significance, he stopped complaining. 
Answer the following questions:
  1. Why is it necessary to transport power at high voltage?
  2. A low power factor implies large power loss. Explain.
  3. Write two values each displayed by Ajit and his uncle.
Assuming an electron is confined to a 1nm wide region , find the uncertainty in momentum using Heisenberg Uncertainty principle (Ref Eq 11.12 of NCERT Textbook). You can assume the uncertainty in position $\Delta\text{x}$ as 1nm. Assuming $\text{p}\Box\Delta\text{p}$, find the energy of the electron in electron volts.
Obtain an expression for the frequency of radiation emitted when a hydrogen atom de $-$ excites from level n to level $(\text{n – ncy })$ of revolution of the electron in the orbit.
An electron of kinetic energy 100eV circulates in a path of radius 10cm in a magnetic field. Find the magnetic field and the number of revolutions per second made by the electron.
Consider the situation shown in figure. The wire PQ has a negligible resistance and is made to slide on the three rails with a constant speed of 5cm/s. Find the current in the $10\Omega$ resistor when the switch S is thrown to:
  1. The middle rail.
  2. The bottom rail.
Consider an assembly of three conducting concentric spherical shells of radii $a, b$ and $c$ as shown in figure. Find the capecitance of the assembly between the poima $A$ and $B$
A converging lens of focal length $15\ cm$ and a converging mirror of focal length $10\ cm$ are placed $50\ cm$ apart. If a pin of length $2.0\ cm$ is placed $30\ cm$ from the lens farther away from the mirror, where will the final image form and what will be the size of the final image?
A circular loop carrying a current i is made of a wire of length L. A uniform magnetic field B exists parallel to the plane of the loop.
  1. Find the torque on the loop.
  2. If the same length of the wire is used to form a square loop, what would be the torque? Which is larger?
A cylindrical vessel, whose diameter and height both are equal to 30cm, is placed on a horizontal surface and a small particle P is placed in it at a distance of 5.0cm from the centre. An eye is placed at a position such that the edge of the bottom is just visible. The particle P is in the plane of drawing. Up to what minimum height should water be poured in the vessel to make the particle P visible?