| 1 |
The device used to rectify farsightedness is
|
Concave Lans <br>
Convex Lens<br>
Spherical Lens<br>
plane Glass<br>
|
| 2 |
Moving electric charge produce:
|
Heat waves <br>
magnetic field<br>
Light rays <br>
Sound weaves<br>
|
| 3 |
Light beam which is highly directional is called
|
Laser<br>
Eraser <br>
Maser <br>
Grazer<br>
|
| 4 |
When milk is churned, the cream separates form its due to
|
Centrifugal forcce<br>
Frictional force<br>
Gravitational force<br>
Viscous forces <br>
|
| 5 |
Which one among the following statement is correct
|
Concave mirrors are used as reflectors <br>
Convex mirrors are used by doctors to examine oral cavity <br>
Convex mirrors are used as refactors <br>
Convex mirrors should be used for <br>
|
| 6 |
Optical fibers are the fine strand s of
|
Glass <br>
Iron<br>
Calcium<br>
Mercury <br>
|
| 7 |
Three dimensional image formed by laser is called:
|
Photography <br>
Hologram<br>
Two Dimensional <br>
Photocopy <br>
|
| 8 |
The procedure of crushing the gallstones and kidney stone by laser is called
|
MRI
Kidney surgery <br>
Angeography <br>
Lithotropsy <br>
|
| 9 |
A mobile phone send s and receives massages through
|
Sound waves <br>
Micro waves<br>
Ultraviolet waves <br>
Radio waves<br>
|
| 10 |
The waves used for sending signals to the satellite form ground station are
|
X-rays<br>
Sound waves <br>
Micro waves<br>
Ultraviolet rays <br>
|
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