| 1 |
<p class="MsoNormal">Sound waves having frequency lower than 20 Hz are called:<o:p></o:p></p> |
- A. <p class="MsoNormal">Ultrasonic<o:p></o:p></p>
- B. <p class="MsoNormal">Infrasonic<o:p></o:p></p>
- C. <p class="MsoNormal">Audible<o:p></o:p></p>
- D. <p class="MsoNormal">Echo<o:p></o:p></p>
|
| 2 |
Field around a charge in which that charge exerts a force on a point charge brought in that field is called: |
- A. Electric field
- B. Magnetic field
- C. Neutral zone
- D. Point charge
|
| 3 |
<p class="MsoNormal">The speed of sound in air at 0°C is:<o:p></o:p></p> |
- A. <p class="MsoNormal">331ms<sup>-1</sup><o:p></o:p></p>
- B. <p class="MsoNormal">376ms<sup>-1</sup><o:p></o:p></p>
- C. <p class="MsoNormal">231ms<sup>-1</sup><o:p></o:p></p>
- D. <p class="MsoNormal">386ms<sup>-1</sup><o:p></o:p></p>
|
| 4 |
<p class="MsoNormal">Which frequency is used by elephants to communicate with
each other:<o:p></o:p></p> |
- A. <p class="MsoNormal">Zero frequency<o:p></o:p></p>
- B. <p class="MsoNormal">Low frequency<o:p></o:p></p>
- C. <p class="MsoNormal">Medium frequency<o:p></o:p></p>
- D. <p class="MsoNormal">High frequency<o:p></o:p></p>
|
| 5 |
<p class="MsoNormal">The basic operations performed by a computer are:<o:p></o:p></p> |
- A. <p class="MsoNormal">Arithmetic operations<o:p></o:p></p>
- B. <p class="MsoNormal">Non-arithmetic operations<o:p></o:p></p>
- C. <p class="MsoNormal">Logical operations<o:p></o:p></p>
- D. <p class="MsoNormal">Both a and c<o:p></o:p></p>
|
| 6 |
<p class="MsoNormal">Intensity level of the sound produced by mosquito buzzing
is:<o:p></o:p></p> |
- A. <p class="MsoNormal">70 dB<o:p></o:p></p>
- B. <p class="MsoNormal">40 dB<o:p></o:p></p>
- C. <p class="MsoNormal">10 dB<o:p></o:p></p>
- D. <p class="MsoNormal">120 dB<o:p></o:p></p>
|
| 7 |
<p class="MsoNormal">Level of noise recommended in eight, hour work day:<o:p></o:p></p> |
- A. <p class="MsoNormal">80-90 dB<o:p></o:p></p>
- B. <p class="MsoNormal">80-85- dB<o:p></o:p></p>
- C. <p class="MsoNormal">85-90 dB<o:p></o:p></p>
- D. <p class="MsoNormal">90-95 dB<o:p></o:p></p>
|
| 8 |
The coulomb's law is valid for the charges which are: |
- A. moving and point charges
- B. moving and non-point charges
- C. stationary and pont charges
- D. stationary and large size charges
|
| 9 |
The speed of sound was accurately measured in: |
- A. 1736
- B. 1737
- C. 1738
- D. 1739
|
| 10 |
A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is: |
- A. 4 times smaller than before
- B. 4 times larger than before
- C. 8 times larger than before
- D. 16 times larger than before.
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