| 1 |
<p class="MsoNormal">Human skin, in dry conditions, has a resistance of:<o:p></o:p></p> |
- A. <p class="MsoNormal">20,000 ohm<o:p></o:p></p>
- B. <p class="MsoNormal">100,000 ohm<o:p></o:p></p>
- C. <p class="MsoNormal">30,000 ohm<o:p></o:p></p>
- D. <p class="MsoNormal">2000 ohm<o:p></o:p></p>
|
| 2 |
The phenomenon in which radiations convert the matter into positive and negative ions is called: |
- A. Radio activity
- B. Excitation
- C. Ionization
- D. Electrolysis
|
| 3 |
Which particles are nucleons? |
- A. Electrons and protons
- B. Protons and neutrons
- C. Electrons and neutrons
- D. Electrons and positrons
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| 4 |
Radiations present in atmosphere due to the presence of different radioactive elements are: |
- A. Cosmic radiations
- B. Background radiations
- C. secondary radiations
- D. Electromagnetic radiations
|
| 5 |
The half life of argon nuclide Ar-40 is: |
- A. 2 x 10<sup>8 </sup>years
- B. 2 .2x 10<sup>8</sup>years
- C. 2.4x 10<sup>8</sup>years
- D. 2.8x 10<sup>8</sup>years
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| 6 |
<p class="MsoNormal">According to ohm’s law V= :<o:p></o:p></p> |
- A. <p class="MsoNormal">I<sup>2</sup>R<o:p></o:p></p>
- B. <p class="MsoNormal">IR<sup>2</sup><o:p></o:p></p>
- C. <p class="MsoNormal">IR<o:p></o:p></p>
- D. <p class="MsoNormal">I/R<o:p></o:p></p>
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| 7 |
<p class="MsoNormal">The current which does not change its direction is called:<o:p></o:p></p> |
- A. <p class="MsoNormal">A.C<o:p></o:p></p>
- B. <p class="MsoNormal">D.C<o:p></o:p></p>
- C. <p class="MsoNormal">Conventional<o:p></o:p></p>
- D. <p class="MsoNormal">Transient current<o:p></o:p></p>
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| 8 |
<p class="MsoNormal">If 2 joules of energy is required to transfer one coulomb of
charge from one point to another, the potential difference between these points
will be:<o:p></o:p></p> |
- A. <p class="MsoNormal">1V<o:p></o:p></p>
- B. <p class="MsoNormal">2V<o:p></o:p></p>
- C. <p class="MsoNormal">4V<o:p></o:p></p>
- D. <p class="MsoNormal"><o:p></o:p>6V</p><p class="MsoNormal"><o:p></o:p></p>
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| 9 |
The half life of plutonium<sup> 236</sup>Pu<sub>94 </sub>is: |
- A. 2.00 years
- B. 2.35 years
- C. 2.79 years
- D. 2.85 years
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| 10 |
<p class="MsoNormal">The commercial unit of electrical energy is:<o:p></o:p></p> |
- A. <p class="MsoNormal">Joule<o:p></o:p></p>
- B. <p class="MsoNormal">Watt<o:p></o:p></p>
- C. <p class="MsoNormal">Kilowatt hour<o:p></o:p></p>
- D. <p class="MsoNormal">Electron volt<o:p></o:p></p>
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