Magnetic permeability is maximum for
|
(a) Diamagnetic substance |
(b) Paramagnetic substance |
|
(c) Ferromagnetic substance |
(d) All of these |
Magnetic permeability is maximum for
|
(a) Diamagnetic substance |
(b) Paramagnetic substance |
|
(c) Ferromagnetic substance |
(d) All of these |
(c) Ferromagnetic substance
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The area of the plates of a parallel plate condenser is A and the distance between the plates is 10 mm. There are two dielectric sheets in it, one of dielectric constant 10 and thickness 6mm and the other of dielectric constant 5 and thickness 4mm. The capacity of the condenser is
|
(a) |
(b) |
(c) |
(d) 1500 |
In an X-ray tube electrons bombarding the target produce X-rays of minimum wavelength 1 Å. What must be the energy of bombarding electrons
|
(a) 13375 eV |
(b) 12375 eV |
(c) 14375 eV |
(d) 15375 eV |
The energy of a photon of characteristic X-rays from a Coolidge tube comes from
| (a) The kinetic energy of the striking electron |
| (b) The kinetic energy of the free electrons of the target |
| (c) The kinetic energy of the ions of the target |
| (d) An electronic transition of the target atom |

What is the net force on a Cl– placed at the centre of the bcc structure of CsCl
|
(a) Zero |
(b) |
(c) |
(d) Data is incomplete |
The resistance of a discharge tube is
|
(a) Ohmic |
(b) Non-ohmic |
(c) Both (a) and (b) |
(d) Zero |