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18th Chapter

10th class Physics Ch 18 (English Medium)

Here you can prepare 10th Physics English Medium Chapter 18 (Radioactivity) Test. Click the button for 100% free full practice test.

Matric Part 2/10th Class Physics Chapter 18 MCQ Test With Answer for Chapter 18 (Radioactivity)

Matric Part 2/10th Class Physics Chapter 18 MCQ Test With Answer for Chapter 18 (Radioactivity)

Sr. # Questions Answers Choice
1 <p class="MsoNormal">diamond des not conduct electricity, because it has no:<o:p></o:p></p>
  • A. <p class="MsoNormal">free electrons<o:p></o:p></p>
  • B. <p class="MsoNormal">free protons<o:p></o:p></p>
  • C. <p class="MsoNormal">free neutrons<o:p></o:p></p>
  • D. <p class="MsoNormal">free positive charge<o:p></o:p></p>
2 The half of carbon 14 is
  • A. 5720 years
  • B. 5730 years
  • C. 5740 years
  • D. 5750 years
3 <p class="MsoNormal">the resistance of an ammeter should be:<o:p></o:p></p>
  • A. <p class="MsoNormal">high<o:p></o:p></p>
  • B. <p class="MsoNormal">very high<o:p></o:p></p>
  • C. <p class="MsoNormal">low<o:p></o:p></p>
  • D. <p class="MsoNormal">constant<o:p></o:p></p>
4 <p class="MsoNormal">If we double both the current and the voltage in a circuit while keeping its resistance constant, the power:<o:p></o:p></p>
  • A. <p class="MsoNormal">Remains unchanged<o:p></o:p></p>
  • B. <p class="MsoNormal">Halves<o:p></o:p></p>
  • C. <p class="MsoNormal">Doubles<o:p></o:p></p>
  • D. <p class="MsoNormal">Four time<o:p></o:p></p>
5 One of the isotopes of uranium is<sup> 238</sup>U<sub>92</sub>the number of neutrons in the isotopes is.
  • A. 92
  • B. 146
  • C. 238
  • D. 330
6 <p class="MsoNormal">Joule’s law is W=<o:p></o:p></p>
  • A. <p class="MsoNormal">IR/t<o:p></o:p></p>
  • B. <p class="MsoNormal">IRt<sup>2</sup><o:p></o:p></p>
  • C. <p class="MsoNormal">IR<sup>2</sup>t<o:p></o:p></p>
  • D. <p class="MsoNormal">I<sup>2</sup>Rt<o:p></o:p></p>
7 <p class="MsoNormal">As the temperature of a conductor rises, its resistance:<o:p></o:p></p>
  • A. <p class="MsoNormal">Increases<o:p></o:p></p>
  • B. <p class="MsoNormal">Increases<o:p></o:p></p>
  • C. <p class="MsoNormal">Decreases<o:p></o:p></p>
  • D. <p class="MsoNormal">Does not change<o:p></o:p></p>
  • E. <p class="MsoNormal">None of these<o:p></o:p></p>
8 <p class="MsoNormal">for which of following ampere second could be the unit:<o:p></o:p></p>
  • A. <p class="MsoNormal">energy<o:p></o:p></p>
  • B. <p class="MsoNormal">current<o:p></o:p></p>
  • C. <p class="MsoNormal">charge<o:p></o:p></p>
  • D. <p class="MsoNormal">power<o:p></o:p></p>
9 The half life of radium - 226 is 1620 years. If N is its total amount then after the four half lives, its left amount will be:
  • A. 1/2 N
  • B. 1/4 N
  • C. 1/8 N
  • D. 1/16 N
10 <p class="MsoNormal">100x10<sup>3</sup> A= :<o:p></o:p></p>
  • A. <p class="MsoNormal">10<sup>-3</sup> A<o:p></o:p></p>
  • B. <p class="MsoNormal">10<sup>-2</sup> A<o:p></o:p></p>
  • C. <p class="MsoNormal">10 A<o:p></o:p></p>
  • D. <p class="MsoNormal">10<sup>-1</sup>A<o:p></o:p></p>

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