| 1 |
What happens to the intensity of the brightness of the lamps connected in series as more and more lamps are added? |
- A. Increases
- B. Decreases
- C. Remains the same
- D. Can not be predicted
|
| 2 |
What is the voltage across a 6Ω resistor when 3 A of current passes through it? |
- A. 2 V
- B. 9 V
- C. 18 V
- D. 36 V
|
| 3 |
<p class="MsoNormal">The center of curved surface of spherical mirror is called:<o:p></o:p></p> |
- A. <p class="MsoNormal">Focus<o:p></o:p></p>
- B. <p class="MsoNormal">Axis<o:p></o:p></p>
- C. <p class="MsoNormal">Centre<o:p></o:p></p>
- D. <p class="MsoNormal">Pole<o:p></o:p></p>
|
| 4 |
<p class="MsoNormal">An object is 14 cm in front of a convex mirror. The image is
5.8 cm behind the mirror. What is the focal length of the mirror:<o:p></o:p></p> |
- A. <p class="MsoNormal">-4.1 cm<o:p></o:p></p>
- B. <p class="MsoNormal">-8.2 cm<o:p></o:p></p>
- C. <p class="MsoNormal">-9.9 cm<o:p></o:p></p>
- D. <p class="MsoNormal">-20 cm<o:p></o:p></p>
|
| 5 |
<p class="MsoNormal">Which of the following quantities is not change during
refraction of light:<o:p></o:p></p> |
- A. <p class="MsoNormal">Its direction<o:p></o:p></p>
- B. <p class="MsoNormal">Its speed<o:p></o:p></p>
- C. <p class="MsoNormal">Its frequency<o:p></o:p></p>
- D. <p class="MsoNormal">Its wavelength<o:p></o:p></p>
|
| 6 |
<p class="MsoNormal">Example of mechanical waves is:<o:p></o:p></p> |
- A. <p class="MsoNormal">Radio waves<o:p></o:p></p>
- B. <p class="MsoNormal">X-rays<o:p></o:p></p>
- C. <p class="MsoNormal">Light waves<o:p></o:p></p>
- D. <p class="MsoNormal">Sound waves<o:p></o:p></p>
|
| 7 |
As the temperature of a conductor rises, its resistance. |
- A. Increase
- B. Decrease
- C. Does not change
- D. None of these
|
| 8 |
Which instrument measures the potential difference: |
- A. Voltmeter
- B. Barometer
- C. Galvanometer
- D. Ammeter
|
| 9 |
Which we double the voltage in a simple electric circuit. We double the |
- A. Current
- B. Power
- C. Resistance
- D. both a and b
|
| 10 |
An electric current in conductors is due to the flow of: |
- A. Positive ions
- B. Negtive ions
- C. Positive charge
- D. free electron
|
