| 1 |
<p class="MsoNormal">For a normal person audible frequency range for sound wave
lies between:<o:p></o:p></p> |
- A. <p class="MsoNormal">10 Hz and 10kHz<o:p></o:p></p>
- B. <p class="MsoNormal">20Hz and 20 kHz<o:p></o:p></p>
- C. <p class="MsoNormal">25 Hz and 25 kHz<o:p></o:p></p>
- D. <p class="MsoNormal">30Hz and 30 kHz<o:p></o:p></p>
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| 2 |
After refraction from a convex lens, rays of light parallel to the principal axis converge at a point, this point of convex lens is called: |
- A. Principal focus
- B. Pole
- C. Focal length
- D. Optical center
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| 3 |
To see from submarine the ship at the surface of water , we use: |
- A. Telescope
- B. Microscope
- C. Peri scope
- D. Prism
|
| 4 |
Speed of light in air is ms<sup>-1</sup> |
- A. 3 x 10<sup>8</sup>
- B. 3 x 10<sup>11</sup>
- C. 3 x 10<sup>5</sup>
- D. 340
|
| 5 |
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
|
| 6 |
Which types of image is produced by the converging lens of human eye if it view a distant object? |
- A. Real , erect, same size
- B. Real, inverted, diminshed
- C. Virtual, erect,diminshed
- D. Virtual, inverted, magnified
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| 7 |
<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>
|
| 8 |
To see stomach problems we use: |
- A. Gastroscope
- B. Bronchoscope
- C. Cystoscope
- D. All of these
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| 9 |
When light passes through a prism it deviates from its original path due to: |
- A. Reflection
- B. Diffraction
- C. Interference
- D. Refraction
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| 10 |
Mathematical relationship between critical angle "C" and refractive index "n" is: |
- A. N = C
- B. N = 1 / sin c
- C. N = 1 / cos c
- D. N = 1 / sin2 c
|