| 1 |
Bouncing back of light after striking the surface is called: |
- A. Refraction
- B. Reflection
- C. Diffraction
- D. Interference
|
| 2 |
To see from submarine the ship at the surface of water , we use: |
- A. Telescope
- B. Microscope
- C. Peri scope
- D. Prism
|
| 3 |
<p class="MsoNormal">How does sound travel from its source to your ear:<o:p></o:p></p> |
- A. <p class="MsoNormal">By changes in air pressure<o:p></o:p></p>
- B. <p class="MsoNormal">By vibration in wires or strings<o:p></o:p></p>
- C. <p class="MsoNormal">By electromagnetic waves<o:p></o:p></p>
- D. <p class="MsoNormal">By infrared waves<o:p></o:p></p>
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| 4 |
The line which passes through pole of the mirror and center of curvature is called principal: |
- A. axis
- B. Focus
- C. Line
- D. None of these
|
| 5 |
Totally reflecting prism turns the incident ray at an angle of: |
- A. 90<sup>o</sup>
- B. 60<sup>o</sup>
- C. 75<sup>o</sup>
- D. 45<sup>o</sup>
|
| 6 |
In a convex mirror the size of the image: |
- A. Is smaller than the size of the object
- B. Is greater than the size of the object
- C. Depends upon the position of the object
- D. Is equal to the size of the object
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| 7 |
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
|
| 8 |
A normal eye can see near objects clearly at a distance of: |
- A. 20 cm
- B. 25 cm
- C. 30 cm
- D. 35 cm
|
| 9 |
Which types of image is formed by a concave lens on a screen? |
- A. Inverted and real
- B. Inverted and virtual
- C. upright and real
- D. Upright and virtual
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| 10 |
<p class="MsoNormal">An example of input device computer is:<o:p></o:p></p> |
- A. <p class="MsoNormal">Keyboard<o:p></o:p></p>
- B. <p class="MsoNormal">printer<o:p></o:p></p>
- C. <p class="MsoNormal">monitor<o:p></o:p></p>
- D. <p class="MsoNormal">RAM<o:p></o:p></p>
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