| 1 |
The presence of a magnetic field can be detected by a |
- A. small mass
- B. Stationary positive charge
- C. Stationary negative charge
- D. Magnetic compass
|
| 2 |
<p class="MsoNormal">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:<o:p></o:p></p> |
- A. <p class="MsoNormal">Remains uncharged<o:p></o:p></p>
- B. <p class="MsoNormal">Becomes positively charged<o:p></o:p></p>
- C. <p class="MsoNormal">Becomes negatively charged<o:p></o:p></p>
- D. <p class="MsoNormal">Unpredictable<o:p></o:p></p>
|
| 3 |
The step-up transformer |
- A. Increases the input current
- B. Increase the input voltage
- C. Has more turns in the primary
- D. Has less turns in hte secondary coil
|
| 4 |
<p class="MsoNormal">The cathode ray oscilloscope consists of main parts:<o:p></o:p></p> |
- A. <p class="MsoNormal">Two<o:p></o:p></p>
- B. <p class="MsoNormal">Three<o:p></o:p></p>
- C. <p class="MsoNormal">Four<o:p></o:p></p>
- D. <p class="MsoNormal">Five<o:p></o:p></p>
|
| 5 |
<p class="MsoNormal">The speed of light in water is:<o:p></o:p></p> |
- A. <p class="MsoNormal">2.0x10<sup>3</sup> ms<sup>-1</sup><o:p></o:p></p>
- B. <p class="MsoNormal">2.5x10<sup>3</sup> ms<sup>-1</sup><o:p></o:p></p>
- C. <p class="MsoNormal">2.3x10<sup>8</sup> ms<sup>-1</sup><o:p></o:p></p>
- D. <p class="MsoNormal">2.3x10<sup>-8</sup> ms<sup>-1</sup><o:p></o:p></p>
|
| 6 |
What is the direction of the magnetic field lines inside a bar magnet? |
- A. From north pole to south pole
- B. From south pole to north pole
- C. From side to side
- D. There are no magnetic field lines.
|
| 7 |
<p class="MsoNormal">In C.R.O grid is always connected with potential:<o:p></o:p></p> |
- A. <p class="MsoNormal">Negative<o:p></o:p></p>
- B. <p class="MsoNormal">Positive<o:p></o:p></p>
- C. <p class="MsoNormal">High positive<o:p></o:p></p>
- D. <p class="MsoNormal">Zero positive<o:p></o:p></p>
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| 8 |
The coil of a transformer which is connected to A.C is called: |
- A. Primary coil
- B. Secondary coil
- C. Field coil
- D. Armature coil
|
| 9 |
Which device is used to increases / decreases A.C Voltage? |
- A. Electric motor
- B. Transformer
- C. A.C Generator
- D. Solenoid
|
| 10 |
When did Michael Faraday discover Electromagnetic induction? |
- A. 1841
- B. 1831
- C. 1821
- D. 1811
|