| 1 |
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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| 2 |
Power of convex lens is 10 D. Its focal length is: |
- A. 100 m
- B. 10 m
- C. 1 m
- D. 0.1 m
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| 3 |
The distance of image from mirror is represented by: |
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| 4 |
<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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| 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>
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| 6 |
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
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| 7 |
Concave mirror formula is given by: |
- A. R = 2r
- B. sin<i/sin<r
- C. 1/f=1/p+1/q
- D. 1/f=1/p-1/q
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| 8 |
<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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| 9 |
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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| 10 |
The distance of spherical mirror is called: |
- A. Curvature
- B. Aperture
- C. Sphere
- D. a,b
|