| 1 |
The special theory of relatively treats the problems involving: |
Inertial frames of reference
Non-inertial frames
Non-accelerated frame
Botha (A) and (C)
Both (B) and (C)
|
| 2 |
Strictly speaking, the earth is: |
An accelerated frame of reference
A non-inertial frame of reference
An inertial frame of reference
<sup>A non-accelerated frame of reference</sup>
Both (A) and (B)
|
| 3 |
The concept of direction is purely: |
Absolute
Relative
Relative to stars always
Relative to the sun always
None of these
|
| 4 |
Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as |
ON switch
off switch
function switch
none of these
|
| 5 |
The energy of the 4th orbit in hydrogen atom is |
2.5 ev
- 3.5 ev
-0.85 ev
-13.6 ev
|
| 6 |
Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of |
photoelectric effect
pair production
Compton effect
uncertainty principle
|
| 7 |
de-Broglies hypthesis was experimentally verified by |
Maxwell
Compton
Einstein
Davison and Germer
|
| 8 |
G.P. Thomson observer experimentally that electrons and neutrons possess |
particle-like properties
wave-like properties
neither particle nor wave like properties
none of these
|
| 9 |
Davision and Germer performed experiment to verify |
de-Brogile hypothesis
theory of relativity
Newton's law of gravitation
Mass-energy relation
|
| 10 |
Wave nature of particle was proposed by |
Einstein
Plank
De-Brogile
Max well
|
| 11 |
Momentum is a parameter associated with |
wave motion
particle motion
neither wave nor particle motion
none of these
|
| 12 |
With the help of 50 K v electron microscope, a resolution of |
0.5 to 1 m to possible
1 m to 10 m is possible
0.5 to 1 nm is possible
1 to 10 nm is possible
|
| 13 |
Which of the following phenomenon proves the particle nature of light |
interference
diffraction
photoelectric effect
none of these
|
| 14 |
An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is |
1.66 x 10<sup>-29</sup>m
1.74 x 10<sup>-10</sup>cm
17.4 x 10<sup>-6</sup>m
1.74 x 10<sup>-10</sup>m
|
| 15 |
A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is |
1.66 m
1.66 x 10<sup>-10</sup>m
1.66 x 10<sup>-29</sup>cm
1.66 x 10<sup>-29</sup>m
|
| 16 |
Victor de-Brogile received the Nobel prize in physics in |
1925
1929
1932
1935
|
| 17 |
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
|
| 18 |
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
|
| 19 |
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
|
| 20 |
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
|
| 21 |
In process of annihilation of matter, the two photons produced move in opposite direction to converse |
momentum
charge
energy
mass
|
| 22 |
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
|
| 23 |
Position was discovered by Carl Anderson in |
1920
1925
1928
1932
|
| 24 |
The existence of position was predicted by Dirace in |
1920
1925
1930
1928
|
| 25 |
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
|
| 26 |
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
|
| 27 |
Converse of pair production is known as |
Compton effect
annihilation of matter
photoelectric effect
none of these
|
| 28 |
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
|
| 29 |
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>
|
| 30 |
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
|
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