X-rays are known to be electromagnetic radiations. Therefore the X-ray photon has
| (a) Electric charge |
| (b) Magnetic moment |
| (c) Both electric charge and magnetic moment |
| (d) Neither electric charge nor magnetic moment |
X-rays are known to be electromagnetic radiations. Therefore the X-ray photon has
| (a) Electric charge |
| (b) Magnetic moment |
| (c) Both electric charge and magnetic moment |
| (d) Neither electric charge nor magnetic moment |
(d) Neither electric charge nor magnetic moment
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A magnet is brought towards a coil (i) speedly (ii) slowly then the induced e.m.f./induced charge will be respectively
|
(a) More in first case / More in first case |
|
(b) More in first case/Equal in both case |
|
(c) Less in first case/More in second case |
|
(d) Less in first case/Equal in both case |
The image which can not be taken on the screen is called:
A coil of 40 W resistance has 100 turns and radius 6 mm is connected to ammeter of resistance of 160 ohms. Coil is placed perpendicular to the magnetic field. When coil is taken out of the field, 32 m C charge flows through it. The intensity of magnetic field will be
|
(a) 6.55 T |
(b) 5.66 T |
(c) 0.655 T |
(d) 0.566 T |
The velocity factor of a transmission line x. If dielectric constant of the medium is 2.6, the value of x is
|
(a) 0.26 |
(b) 0.62 |
(c) 2.6 |
(d) 6.2 |
A convex lens of crown glass (n =1.525) will behave as a divergent lens if immersed in
|
(a) Water (n = 1.33) |
(b) In a medium of n = 1.525 |
|
(c) Carbon disulphide n = 1.66 |
(d) It cannot act as a divergent lens |
Radioactive nuclei that are injected into a patient collect at certain sites within its body, undergoing radioactive decay and emitting electromagnetic radiation. These radiations can then be recorded by a detector. This procedure provides an important diagnostic tool called
|
(a) Gamma camera |
(b) CAT scan |
|
(c) Radiotracer technique |
(d) Gamma ray spectroscopy |