| 1 |
For sending sound waves at large distance, Which waves are used
|
Infrared waves<br>
Radio waves <br>
Light waves <br>
X-waves<br>
|
| 2 |
Light travels in optical fiber irrespective of its sharp because it is a device by which single can be transferred form one location to another. It is based on the phenomenon of:
|
Total internal reflection of light <br>
Diffraction of light <br>
Polarization of light<br>
Refraction of light<br>
|
| 3 |
A man is at rest in the middle of a horizontal plane of perfectly smooth surface of ice. He can move himself to the shore by making use of Newton's
|
Third law of motion<br>
First law motion <br>
Second law of motion<br>
Firs, Second and third laws of motion<br>
|
| 4 |
Which one among the following is the major cause of blurring and unsharp images of objects observe through very large telescope at the extreme limit of magnification?
|
Varying density of air in the Earth's atmosphere<br>
Poor tracking capacities of telescopes <br>
Air turbulence of earth's atmosphere<br>
Poor optical polish achievable on large mirrors <br>
|
| 5 |
bats can ascertain distance, directions, natural and size of the obstacles at night, This is possible by reflection of the emitted?
|
Supersonic waves for distant object <br>
Supersonic waves form the bat <br>
Ultrasonic waves form distant objects <br>
Ultrasonic waves form the bat<br>
|
| 6 |
When a moving bus suddenly applies brakes, The passenger sitting fall in the forward direction. This ca be explained by:
|
Theory of relativity <br>
Newton's third law <br>
Newton's second law<br>
Newton's first law<br>
|
| 7 |
The materiel used for electric fuse is an alloy of tine and lead. This lead. This alloy should have:
|
High specific resistance and high melting point <br>
Low specific resistance and low melting<br>
Low specific resistance and high melting <br>
high specific resistance and low melting point <br>
|
| 8 |
The line of force of a uniform magnetic field
|
Must be divergent <br>
Must be convergent <br>
Must be parallel to teach other <br>
intersect<br>
|
| 9 |
If the electrical resistance of a typical substance suddenly drops suddenly drops to zero then the substance is called
|
Semiconductor <br>
Conductor <br>
Super conductor <br>
Insulator<br>
|
| 10 |
The star seem to be higher on the sky than they actually are: This be explained by:
|
Diffraction of light<br>
Atmospheric refraction <br>
Total internal reflection <br>
Total internal reflection <br>
|
.gif)
Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
