MCQ
Potential energy of a charged conductor is :
- A$ CV^2 $
- ✓$ \frac{1}{2} CV^2 $
- C$ \frac{1}{3} CV^2 $
- D$ \frac{1}{4} CV^2 $
✓
Answer
Correct option: B.
$ \frac{1}{2} CV^2 $
B
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
A superconductor exhibits perfect:
The electrical conductivity of semiconductor increases when electromagnetic radiation of wavelength shorter than 2800 nm is incident on it. The band gap in (eV) for the semiconductor is:
The pole pieces of the magnet used in a pivoted coil galvanometer are(a) Plane surfaces of a bar magnet(b) Plane surfaces of a horse-shoe magnet(c) Cylindrical surfaces of a bar magnet(d) Cylindrical surfaces of a horse-shoe magnet
An object is placed at a distance u from a simple microscope of focal length f. The angular magnification obtained depends:
-
On f but not on u.
-
On u but not on f.
-
On f as well as u.
-
Neither on f nor on u.
Mass number is:
Emission spectrum of $CO_2$ gas
→Four equal charges $Q$ are placed at the four corners of a square of each side is $' d\ '.$ Work done in removing a charge $-Q$ from its centre to infinity is
→A conducting square loop of side l and resistance R moves in its plane with a uniform velocity u perpendicular to one of its sides. A uniform and constant magnetic field B exists along the perpendicular to the plane of the loop as shown in figure. The current induced in the loop is:
Which is the correct relation for forbidden energy gap in conductor, semi conductor and insulator
The optical density of turpentine is higher than that of water while its mass density is lower. Fig. shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in Fig, the path shown is correct?
