| 1 |
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
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| 2 |
Magnetic effect of electric current was first discovered by: |
- A. Faraday
- B. Ampere
- C. Volta
- D. Lenz
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| 3 |
The direction of induced e.m.f. in a circuit is in accordance with conservation of. |
- A. Mass
- B. Charge
- C. Momentum
- D. Energy
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| 4 |
The voltage is decreased by: |
- A. Step-up transformer
- B. Step-down transformer
- C. A.C. generator
- D. D.C. Motor
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| 5 |
A.C generator works on the principle of: |
- A. Electrostatic induction
- B. Electromagnetic induction
- C. Law of gravitation
- D. Third law of motion
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| 6 |
A transformer has 100 turns in its primary and 500 turns in secondary coil. If 6 volts D.C is applied across its primary, the voltage induced across its secondary coil will be: |
- A. 0 volt
- B. 30 volts
- C. 45 volts
- D. 60 volts
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| 7 |
In A.C. generator flux will be zero if coil is to the field. |
- A. 90<sup>o</sup>
- B. 45<sup>o</sup>
- C. Parallel
- D. Inclined
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| 8 |
<p class="MsoNormal">The refracted light striking to the side of prism is called:<o:p></o:p></p> |
- A. <p class="MsoNormal">Refracted ray<o:p></o:p></p>
- B. <p class="MsoNormal">Incident ray<o:p></o:p></p>
- C. <p class="MsoNormal">Reflected ray<o:p></o:p></p>
- D. <p class="MsoNormal">Emergent ray<o:p></o:p></p>
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| 9 |
<p class="MsoNormal">Optical fibres works on the principle of:<o:p></o:p></p> |
- A. <p class="MsoNormal">Reflection<o:p></o:p></p>
- B. <p class="MsoNormal">Refraction<o:p></o:p></p>
- C. <p class="MsoNormal">Total internal reflection<o:p></o:p></p>
- D. <p class="MsoNormal">Diffraction<o:p></o:p></p>
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| 10 |
<p class="MsoNormal">Bouncing back of light after striking the surface is called:<o:p></o:p></p> |
- A. <span style="font-size:11.0pt;line-height:107%;
font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:
Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;
mso-bidi-font-family:Arial;mso-bidi-theme-font:minor-bidi;mso-ansi-language:
EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Refraction</span>
- B. <p class="MsoNormal">Reflection<o:p></o:p></p>
- C. <p class="MsoNormal">Diffraction<o:p></o:p></p>
- D. <p class="MsoNormal">Interference<o:p></o:p></p>
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