| 1 |
The distance between principal focus and pole of mirror is called: |
- A. Princpal focus
- B. Focal length
- C. P
- D. Image
|
| 2 |
<p class="MsoNormal">The distance between two consecutive waves compressions or
rarefactions is called:<o:p></o:p></p> |
- A. <p class="MsoNormal">Focal length<o:p></o:p></p>
- B. <p class="MsoNormal">Wave length<o:p></o:p></p>
- C. <p class="MsoNormal">Frequency<o:p></o:p></p>
- D. <p class="MsoNormal">Time period<o:p></o:p></p>
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| 3 |
Optical fibre are: |
- A. Cheap
- B. Flexible
- C. Lighter
- D. All of these
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| 4 |
<p class="MsoNormal">CD which is made of soft material is called:<o:p></o:p></p> |
- A. <p class="MsoNormal">Hard disk<o:p></o:p></p>
- B. <p class="MsoNormal">Floppy disk<o:p></o:p></p>
- C. <p class="MsoNormal">Iron disk<o:p></o:p></p>
- D. <p class="MsoNormal">Copper disk<o:p></o:p></p>
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| 5 |
<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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| 6 |
<p class="MsoNormal">Which is an example of a longitudinal wave:<o:p></o:p></p> |
- A. <p class="MsoNormal">Sound wave<o:p></o:p></p>
- B. <p class="MsoNormal">Light wave<o:p></o:p></p>
- C. <p class="MsoNormal">Radio wave<o:p></o:p></p>
- D. <p class="MsoNormal">Water wave<o:p></o:p></p>
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| 7 |
Magnification of mirror is given by: |
- A. m=p/q
- B. m=q/p
- C. m=pxq
- D. m=1/p+q
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| 8 |
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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| 9 |
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
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| 10 |
The focal length is related to radius of curvature by the formula: |
- A. f = 2R
- B. f = 4R
- C. f = R/2
- D. R = f/2
|