| 1 |
The turn ratios of a transformer is 10. It means. |
- A. I<sub>s</sub> = 10I<sub>p</sub>
- B. N<sub>s</sub> = N<sub>p</sub>
- C. N<sub>s</sub> = 10 N<sub>p</sub>
- D. V<sub>s</sub> =V<sub>p</sub> /10
|
| 2 |
<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>
|
| 3 |
<p class="MsoNormal">In totally reflecting prism one angle is of 90°, and other
two angles are of:<o:p></o:p></p> |
- A. <p class="MsoNormal">30°,30°<o:p></o:p></p>
- B. <p class="MsoNormal">45°,90°<o:p></o:p></p>
- C. <p class="MsoNormal">45°,45°<o:p></o:p></p>
- D. <p class="MsoNormal">40°,40°<o:p></o:p></p>
|
| 4 |
Which type of energy is converted into mechanical energy in the D.C. Motor. |
- A. Magnetic energy
- B. Heat energy
- C. Electrical energy
- D. Chemical energy
|
| 5 |
The voltage is decreased by: |
- A. Step-up transformer
- B. Step-down transformer
- C. A.C. generator
- D. D.C. Motor
|
| 6 |
<p class="MsoNormal">The ray of light after reflection from concave mirror passes
through:<o:p></o:p></p> |
- A. <p class="MsoNormal">Centre<o:p></o:p></p>
- B. <p class="MsoNormal">Principal focus<o:p></o:p></p>
- C. <p class="MsoNormal">Pole<o:p></o:p></p>
- D. <p class="MsoNormal">Radius<o:p></o:p></p>
|
| 7 |
<p class="MsoNormal">In SI the unit of
charge is:<o:p></o:p></p> |
- A. <p class="MsoNormal">Joule<o:p></o:p></p>
- B. <p class="MsoNormal">Volt<o:p></o:p></p>
- C. <p class="MsoNormal">Coulomb<o:p></o:p></p>
- D. <p class="MsoNormal">Watt<o:p></o:p></p>
|
| 8 |
<p class="MsoNormal">The line which passes through pole of the mirror and center
of curvature is called principal:<o:p></o:p></p> |
- A. <p class="MsoNormal">Axis<o:p></o:p></p>
- B. <p class="MsoNormal">Focus<o:p></o:p></p>
- C. <p class="MsoNormal">Line<o:p></o:p></p>
- D. <p class="MsoNormal">None of these<o:p></o:p></p>
|
| 9 |
A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage. |
- A. 0 V
- B. 30 V
- C. 45 V
- D. 60 V
|
| 10 |
The direction of induced e.m.f. in a circuit is in accordance with conservation of. |
- A. Mass
- B. Charge
- C. Momentum
- D. Energy
|