| 1 |
Victor de-Brogile received the Nobel prize in physics in |
1925
1929
1932
1935
|
| 2 |
0.1 kg mass will be equivalent to the energy |
9 x 10<sup>15</sup>J
5 x 10<sup>8</sup>J
6 x 10<sup>16</sup>J
9 x 10<sup>-16</sup>J
|
| 3 |
The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is |
100 J
1.6 x 10<sup>-17</sup>J
100 eV
1.6 x 10<sup>-17</sup>eV
|
| 4 |
According to the de-Brogile relation, an object of large mass and ordinary speed has |
very small wavelength
very large wavelength
very small frequency
all of these
|
| 5 |
Photocell is a device which converts |
chemical energy into electrical energy
electrical energy into light energy
heat energy into electrical energy
light energy into electrical energy
|
| 6 |
In process of annihilation of matter, the two photons produced move in opposite direction to converse |
momentum
charge
energy
mass
|
| 7 |
Pair production is the phenomenon in which |
matter is converted into energy
energy is converted into matter
light is converted into electrical energy
electrical energy is converted into light
|
| 8 |
Position was discovered by Carl Anderson in |
1920
1925
1928
1932
|
| 9 |
The existence of position was predicted by Dirace in |
1920
1925
1930
1928
|
| 10 |
When a position comes close to an electron they annihilate into photons such that |
each photon has energy 0.51 Me v
each photon has energy 1.02 Me v
each photon has energy 0.25 Me v
none of these
|
| 11 |
When a position comes close to an electron they annihilate into |
one photon
two photons which travel in the same direction
two photons which travels in the opposite direction
two photons which travel in any direction
|
| 12 |
Converse of pair production is known as |
Compton effect
annihilation of matter
photoelectric effect
none of these
|
| 13 |
In order to produce pair production, a photon must have a energy |
0.511 Me v
0.256 Me v
1.02 Me v
0.956 Me v
|
| 14 |
If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be |
2.120<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°A</span>
0.212<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°A</span>
21.2<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°A</span>
0.14<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span><div><span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">a</span></div>
|
| 15 |
When a high energy photon interact with a metal, which of the following effect is most likely to be taken place |
pair production
photoelectric effect
Compton effect
None of these
|
.gif)
Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
