| 1 |
The unit of potential difference is: |
- A. Volt
- B. Coulomb
- C. Ampere
- D. Joule
|
| 2 |
Electric potential and e.m.f. |
- A. are the same terms
- B. are the different terms
- C. have different units
- D. both b and c
|
| 3 |
<p class="MsoNormal">Half of radius of curvature is called:<o:p></o:p></p> |
- A. <p class="MsoNormal">Focal length<o:p></o:p></p>
- B. <p class="MsoNormal">Principal focus<o:p></o:p></p>
- C. <p class="MsoNormal">Axis<o:p></o:p></p>
- D. <p class="MsoNormal">Aperture<o:p></o:p></p>
|
| 4 |
The current used in houses is: |
- A. A.C.
- B. Conventiona current
- C. Current
- D. D.C
|
| 5 |
The S.I unit of electric current is: |
- A. Volt
- B. Ampere
- C. Coulomb
- D. Watt
|
| 6 |
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
|
| 7 |
<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>
|
| 8 |
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>
|
| 9 |
A conductor of electric current is: |
- A. Wood
- B. Rubber
- C. Plastic
- D. Copper
|
| 10 |
An electric current in conductors is due to the flow of: |
- A. Positive ions
- B. Negtive ions
- C. Positive charge
- D. free electron
|