| 1 |
In an nihilation emitted photons moves in opposite directions to conserve. |
- A. Mass
- B. Charge
- C. Energy
- D. Momentum
|
| 2 |
The special theory of relativity based on. |
- A. One postulate
- B. Two postulates
- C. Three postulates
- D. Four postulates
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| 3 |
The value of Stefan is constant is: |
- A. 4.57 x 10<sup>-8</sup> m<sup>2</sup>k<sup>2</sup>
- B. 5.67 x10<sup>-8</sup> wm<sup>-2</sup>k<sup>-4</sup>
- C. 6.67x 10<sup>-11</sup> wm<sup>2</sup>k<sup>4</sup>
- D. 7.45 x 10<sup>-9</sup> m<sup>2</sup> wk<sup>3</sup>
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| 4 |
Using relativistic effects the location of an air craft after an hour fight can be predicated about |
- A. 20 m
- B. 50 m
- C. 760 m
- D. 780 m
|
| 5 |
Earth orbital speed is. |
- A. 10 km/s
- B. 20 km/s
- C. 30 km/s
- D. 40 km/s
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| 6 |
Pair production cannto take place in vacuum because : |
- A. Mass in not conserved
- B. Momentum is not conserved
- C. Energy is not conserved
- D. Charge is not conserved
|
| 7 |
Disintegration of photon on striking a nucleus into an electron and positron is known as. |
- A. Annihilation of matter
- B. Compton effect
- C. Pair production
- D. Photo electric effect
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| 8 |
The energy of photon is givne by |
- A. mv2/2
- B. hf
- C. Va e
- D. mac<sup>1</sup>
|
| 9 |
Photodiode is used for wave nature of. |
- A. Light
- B. Thermal radiation
- C. Radi waves
- D. Sound waves
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| 10 |
The unit for Plank's constant is: |
- A. Js<sup>-1</sup>
- B. Jm
- C. Js
- D. Jm<sup>2</sup>
|