| 1 |
When the object is placed beyond 2F of a convex lens, the image formed will be: |
- A. Real, inverted and smaller than the object
- B. Real, inverted and of the same size as the object
- C. Real, inverted and larger in size than the object
- D. Virtual, erect and larger in size than the object
|
| 2 |
The centre of spherical mirror is called: |
- A. Focus
- B. Axis
- C. Centre
- D. Pole
|
| 3 |
<p class="MsoNormal">What does the term e-mail stand for:<o:p></o:p></p> |
- A. <p class="MsoNormal">Emergency mail<o:p></o:p></p>
- B. <p class="MsoNormal">Electronic mail</p>
- C. <p class="MsoNormal">Extra mail<o:p></o:p></p>
- D. <p class="MsoNormal">External mail<o:p></o:p></p>
|
| 4 |
To see from submarine the ship at the surface of water , we use: |
- A. Telescope
- B. Microscope
- C. Peri scope
- D. Prism
|
| 5 |
Optical fibre are: |
- A. Cheap
- B. Flexible
- C. Lighter
- D. All of these
|
| 6 |
If a ray of light is glass is incident on an air surface at an angle greater than the critical angle, the ray will. |
- A. refract only
- B. reflect only
- C. partially refract and partially reflect
- D. Diffract only
|
| 7 |
<p class="MsoNormal">A data storage device is:<o:p></o:p></p> |
- A. <p class="MsoNormal">Printer<o:p></o:p></p>
- B. <p class="MsoNormal">Hard disk<o:p></o:p></p>
- C. <p class="MsoNormal">Monitor<o:p></o:p></p>
- D. <p class="MsoNormal">CPU<o:p></o:p></p>
|
| 8 |
Totally reflecting prism is used in: |
- A. periscope
- B. binoculars
- C. periscope and binocular
- D. telescope
|
| 9 |
The index of refraction depends on: |
- A. The focal length
- B. The speed of light
- C. the image distance
- D. The object distance
|
| 10 |
The distance of the object from the mirror is represented by : |
|
