| 1 |
The SI unit of electric field intensity is: |
- A. NC-2
- B. NC-1
- C. Ns
- D. Nm-1
|
| 2 |
<p class="MsoNormal">Which is used to investigate the properties of electron
beam:<o:p></o:p></p> |
- A. <p class="MsoNormal">LDR<o:p></o:p></p>
- B. <p class="MsoNormal">Electroscope<o:p></o:p></p>
- C. <p class="MsoNormal">Proton gun<o:p></o:p></p>
- D. <p class="MsoNormal">Electron gun<o:p></o:p></p>
|
| 3 |
If a charged body is brought near a negatively charged electroscope and the leaves of electroscope diverge, then the body is: |
- A. Positively charged
- B. Negatively charged
- C. Neutral
- D. None of these
|
| 4 |
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
|
| 5 |
Capacitance is defined as: |
- A. VC
- B. Q/V
- C. QV
- D. V/Q
|
| 6 |
<p class="MsoNormal">In case of OR and AND operation, if switches s<sub>1</sub>
and s<sub>2</sub> both are open then lamp is:<o:p></o:p></p> |
- A. <p class="MsoNormal">On<o:p></o:p></p>
- B. <p class="MsoNormal">Off<o:p></o:p></p>
- C. <p class="MsoNormal">Sometimes on and sometimes off<o:p></o:p></p>
- D. <p class="MsoNormal">Neither on nor off<o:p></o:p></p>
|
| 7 |
Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A. |
- A. Remains uncharged
- B. Becomes positively charged
- C. Becomes negatively charged
- D. Unpredicatable
|
| 8 |
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.
|
| 9 |
<p class="MsoNormal">The speed of sound in air at 21 °C is:<span style="font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><o:p></o:p></span></p> |
- A. <p class="MsoNormal">336ms<sup>-1</sup><o:p></o:p></p>
- B. <p class="MsoNormal">343ms<sup>-1</sup><o:p></o:p></p>
- C. <p class="MsoNormal">430ms<sup>-1</sup><o:p></o:p></p>
- D. <p class="MsoNormal">470ms<sup>-1<o:p></o:p></sup></p>
|
| 10 |
<p class="MsoNormal">The unit of intensity of sound:<o:p></o:p></p> |
- A. <p class="MsoNormal">Wm<sup>-1</sup><o:p></o:p></p>
- B. <p class="MsoNormal">Wm<sup>-2</sup><o:p></o:p></p>
- C. <p class="MsoNormal">Wm<o:p></o:p></p>
- D. <p class="MsoNormal">Wm<sup>2</sup><o:p></o:p></p>
|