- A100
- B106
- C104
- DNone of these
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In the given figure, the electron enters into the magnetic field. It deflects in ...... direction
|
(a) + ve X direction |
(b) – ve X direction |
(c) + ve Y direction |
(d) – ve Y direction |
X-ray will travel minimum distance in
|
(a) Air |
(b) Iron |
(c) Wood |
(d) Water |
If
and
are the number of electrons and holes in a semiconductor heavily doped with phosphorus, then
|
(a) |
(b) |
(c) |
(d) |
The network shown in the figure is a part of a complete circuit. If at a certain instant the current i is 5 A and is decreasing at the rate of
then
is

|
(a) 5 V |
(b) 10 V |
(c) 15 V |
(d) 20 V |
In a two slit experiment with monochromatic light fringes are obtained on a screen placed at some distance from the sits. If the screen is moved by 5
towards the slits, the change in fringe width is 3
. If separation between the slits is
, the wavelength of light used is
|
(a) 6000 Å |
(b) 5000 Å |
(c) 3000 Å |
(d) 4500 Å |
The minimum wavelength of photon is 5000 Å, its energy will be
|
(a) 2.5 eV |
(b) 50 V |
(c) 5.48 eV |
(d) 7.48 eV |
For the production of characteristic
X-ray, the electron transition is
|
(a) n = 2 to n = 1 |
(b) n = 3 to n = 2 |
(c) n = 3 to n = 1 |
(d) n = 4 to n = 1 |
and
represents gravitational and electrostatic force respectively between electrons situated at a distance 10 cm. The ratio of
is of the order of
|
(a) |
(b) 10 |
(c) 1 |
(d) |