| 1 |
An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located: |
- A. out beyond the centre of curvature.
- B. at the centre of curvature
- C. between the centre of curvature and the focal point
- D. at the focal point
|
| 2 |
The refractive index of air is: |
|
| 3 |
The angle of which prism deviates the incident ray is called: |
- A. angle of incident
- B. angle of reflection
- C. angle of deviation
- D. angle of minimum deviation
|
| 4 |
<p class="MsoNormal">From which of the following we can get information almost
about everything:<o:p></o:p></p> |
- A. <p class="MsoNormal">Book<o:p></o:p></p>
- B. <p class="MsoNormal">Teacher<o:p></o:p></p>
- C. <p class="MsoNormal">Computer<o:p></o:p></p>
- D. <p class="MsoNormal">Internet<o:p></o:p></p>
|
| 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>
|
| 6 |
Snell' law is: |
- A. n = sin<x/sin <r
- B. n=sin <i/sin<r
- C. n = sin <r/sin<i
- D. <i/<r
|
| 7 |
An object is placed 6 cm away in front of a concave mirror that has 10 cm focal length. Determine the location of the image: |
- A. -5 cm
- B. -10 cm
- C. -15 cm
- D. -20 cm
|
| 8 |
Spherical mirrors are used in: |
- A. Medical
- B. Search light
- C. Microscope
- D. All of these
|
| 9 |
Power of lens is: |
- A. q/p
- B. 1/q
- C. 1/p
- D. 1/f
|
| 10 |
The distance of the object from the mirror is represented by : |
|