| 1 |
The resistance of voltmeter is: |
- A. zero
- B. low
- C. Very high
- D. 10Ω
|
| 2 |
As the temperature of a conductor rises, its resistance. |
- A. Increase
- B. Decrease
- C. Does not change
- D. None of these
|
| 3 |
What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A? |
- A. 4.8 W
- B. 14.5 W
- C. 30 W
- D. 60 W
|
| 4 |
Specific resistance of copper is ____________ x 10<sup>-8</sup>Ohm-meter |
- A. 1.62
- B. 1.69
- C. 5.25
- D. 2.75
|
| 5 |
<p class="MsoNormal">We can distinguish between the notes of a piano and flute
due to ………… of sound.<o:p></o:p></p> |
- A. <p class="MsoNormal">Loudness<o:p></o:p></p>
- B. <p class="MsoNormal">Pitch<o:p></o:p></p>
- C. <p class="MsoNormal">Quality<o:p></o:p></p>
- D. <p class="MsoNormal">Intensity<o:p></o:p></p>
|
| 6 |
Which one is a safety device? |
- A. Switch
- B. Fuse
- C. Circuit breaker
- D. Both B and C
|
| 7 |
The unit of (ρ) in formula R=ρ.L/a is______________. |
- A. Ω
- B. Ω-m
- C. Ω-m<sup>2</sup>
- D. Ω-m<sup>-2</sup>
|
| 8 |
The current used in houses is: |
- A. A.C.
- B. Conventiona current
- C. Current
- D. D.C
|
| 9 |
What should household appliances be connected in parallel with the voltage source? |
- A. to increase the resistance of the circuit
- B. to decrease the resistance of the circuit
- C. to provide each appliance the same voltage as the power source
- D. to provide each appliance the same current as the power source
|
| 10 |
<p class="MsoNormal">An object is placed at the Centre of curvature of a concave
mirror. The image produced by the mirror is located:<o:p></o:p></p> |
- A. <p class="MsoNormal">Out beyond the centre of curvature<o:p></o:p></p>
- B. <p class="MsoNormal">At the centre of curvature<o:p></o:p></p>
- C. <p class="MsoNormal">Between the centre of curvature and the focal point<o:p></o:p></p>
- D. <p class="MsoNormal">At the focal point<o:p></o:p></p>
|