| 1 |
<p class="MsoNormal">In compound microscope, the objective have focal length than
eye-piece:<o:p></o:p></p> |
- A. <p class="MsoNormal">Smaller<o:p></o:p></p>
- B. <p class="MsoNormal">Larger<o:p></o:p></p>
- C. <p class="MsoNormal">Equal<o:p></o:p></p>
- D. <p class="MsoNormal">Equal and larger<o:p></o:p></p>
|
| 2 |
<p class="MsoNormal">Spherical mirrors are used in:<o:p></o:p></p> |
- A. <p class="MsoNormal">Medical<o:p></o:p></p>
- B. <p class="MsoNormal">Search light<o:p></o:p></p>
- C. <p class="MsoNormal">Microscope<o:p></o:p></p>
- D. <p class="MsoNormal">All of these<o:p></o:p></p>
|
| 3 |
D.C. motor converts. |
- A. Mechanical energy into electrical energy
- B. Mechanical energy into chemical energy
- C. Electrical energy into mechanical energy
- D. Electrical energy into chemical energy
|
| 4 |
Which statement is true about the magnetic poles? |
- A. Unlike poles repel
- B. Like poles attract
- C. Magnetic poles do not effect each other
- D. A single magnetic pole does not exist
|
| 5 |
<p class="MsoNormal">In totally reflecting prism one angle is of:<o:p></o:p></p> |
- A. <p class="MsoNormal">45°<o:p></o:p></p>
- B. <p class="MsoNormal">90°<o:p></o:p></p>
- C. <p class="MsoNormal">180°<o:p></o:p></p>
- D. <p class="MsoNormal">120°<o:p></o:p></p>
|
| 6 |
When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is: |
- A. The same as direction of field
- B. Opposite the direction of field
- C. Makes an angle of 45<sup>o</sup>with the current
- D. At right angle to both the field and the current.
|
| 7 |
<p class="MsoNormal">To see from submarine and the ship at the surface of water,
we use:<o:p></o:p></p> |
- A. <p class="MsoNormal">Telescope<o:p></o:p></p>
- B. <p class="MsoNormal">Microscope<o:p></o:p></p>
- C. <p class="MsoNormal">Periscope<o:p></o:p></p>
- D. <p class="MsoNormal">Prism<o:p></o:p></p>
|
| 8 |
Which device has two coils, primary and secondary? |
- A. D.C. Motor
- B. Transformer
- C. A.C. genrator
- D. a and b
|
| 9 |
What is the direction of the magnetic field lines inside a bar magnet? |
- A. From north pole to south pole
- B. From south pole to north pole
- C. From side to side
- D. There are no magnetic field lines.
|
| 10 |
When did Michael Faraday discover Electromagnetic induction? |
- A. 1841
- B. 1831
- C. 1821
- D. 1811
|