| 1 |
The principal of light on whihc the fibre optics works is. |
- A. Reflection
- B. Refraction
- C. Total internal reflection
- D. Dispersion
|
| 2 |
What discovered radioactivity? |
- A. Einstein
- B. Newton
- C. J.J. Thomson
- D. Henry Becquerel
|
| 3 |
----------------- rays are used to detect the flaws and crocks of metal parts. |
- A. a -rays
- B. gama rays
- C. beta rays
- D. None of these
|
| 4 |
Laser is used toproduce three -Dimensional image called. |
- A. Holograms
- B. Holography
- C. Lithotropsy
- D. Radioactive elements
|
| 5 |
Bagasse is used as in. |
- A. Sugar mills
- B. Cattle feeds
- C. Alcohol
- D. Cotton textile
|
| 6 |
Frequency of ultrasound is. |
- A. Less than 20 Hz
- B. 20 KHz
- C. 30 KHz
- D. More than 20 khn
|
| 7 |
The charge on alpha particle is: |
|
| 8 |
Which type of rays are used in the solar system fitted on ships and submarines to find the hidden secrets under water: |
- A. x - rays
- B. C.T Scan
- C. Ultrasound
- D. Light
|
| 9 |
If we increasing angle of incidence then at a particular angle incidence the angel of refraction is. |
- A. 45 <sup>o</sup>
- B. 60 <sup>o</sup>
- C. 30 <sup>o</sup>
- D. 90 <sup>o</sup>
|
| 10 |
In ........ henry Bequeral discovered. |
- A. 1895
- B. 1886
- C. 1896
- D. 1898
|
