| 1 |
<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>
|
| 2 |
The electrostatic force acting on two charges each of 1 C separated by 1m is about . |
- A. 9 x 10<sup>9</sup> N
- B. 9 x 10<sup>-9</sup>N
- C. 9 x 10<sup>8</sup>N
- D. 9 x 10<sup>-8</sup>N
|
| 3 |
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
|
| 4 |
SI unit of electric intensity is: |
- A. NC
- B. NC<sup>-1</sup>
- C. NC<sup>-2</sup>
- D. NC<sup>-3</sup>
|
| 5 |
Mathematical formula of capacitance of a capacitor is: |
- A. C = QV
- B. C = Q/V
- C. C = V/Q
- D. C = V2/Q
|
| 6 |
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.
|
| 7 |
<p class="MsoNormal">The pitch of a sound is most closely related to its:<o:p></o:p></p> |
- A. <p class="MsoNormal">Wave form<o:p></o:p></p>
- B. <p class="MsoNormal">Period<o:p></o:p></p>
- C. <p class="MsoNormal">Amplitude<o:p></o:p></p>
- D. <p class="MsoNormal">Frequency<o:p></o:p></p>
|
| 8 |
Two charged spheres are separated by 2 mm. Which of the following would produced the greatest attractive force? |
- A. +1 q and +4q
- B. -1 q and -4q
- C. +2 q and +2q
- D. +2 q and -2q
|
| 9 |
<p class="MsoNormal">The intensity of lawn mover is:<o:p></o:p></p> |
- A. <p class="MsoNormal">10-1 wm<sup>-2</sup><o:p></o:p></p>
- B. <p class="MsoNormal">10-2 wm<sup>-2</sup><o:p></o:p></p>
- C. <p class="MsoNormal">10-3 wm<sup>-2</sup><o:p></o:p></p>
- D. <p class="MsoNormal">10-4 wm<sup>-2</sup><o:p></o:p></p>
|
| 10 |
<p class="MsoNormal">Ultrasound waves carry energy:<o:p></o:p></p> |
- A. <p class="MsoNormal">Less<o:p></o:p></p>
- B. <p class="MsoNormal">More<o:p></o:p></p>
- C. <p class="MsoNormal">Equal<o:p></o:p></p>
- D. <p class="MsoNormal">None of these<o:p></o:p></p>
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