ECAT Physics Chapter 13 Current Electricity Online Test With Answers

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ECAT Physics Chapter 13 Current Electricity Online Test

Sr. # Questions Answers Choice
1 The conventional current is the name given to current due to flow of: <span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt; text-align: justify;">Positrons</span> <p class="MsoNormal" style="text-align:justify"><span style="font-size: 12pt; line-height: 107%; font-family: &quot;Times New Roman&quot;, serif;">Positive charges<b><o:p></o:p></b></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Negative charges<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Both (A) and (C)<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">None of these<o:p></o:p></span></p>
2 In gases, the charge carries are: <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Electrons<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Positive ions<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Negative ions<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Both (A) and (C)<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size: 12pt; line-height: 107%; font-family: &quot;Times New Roman&quot;, serif;">Both (A) and (B)<b><o:p></o:p></b></span></p>
3

The charge carries in the electrolyte are:

 <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Positive ions<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Negative ions<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Either (A) or (B)<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Both (A) and (B)<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Neither (A) nor (B)<o:p></o:p></span></p>
4

In case of metallic conductors, the change carries are:

 <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Protons<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size: 12pt; line-height: 107%; font-family: &quot;Times New Roman&quot;, serif;">Electrons<b><o:p></o:p></b></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Antiprotons<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Positrons<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Both (A) and (B)<o:p></o:p></span></p>
5

The current that flows through the coil of a motor causes:

 <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Its shaft to revolve<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Its brushes to rotate<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Motor to move<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size: 12pt; line-height: 107%; font-family: &quot;Times New Roman&quot;, serif;">Its shafts to rotate<b><o:p></o:p></b></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">None of these<o:p></o:p></span></p>
6 Most practical application of electricity involve <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Charges at the rest<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size: 12pt; line-height: 107%; font-family: &quot;Times New Roman&quot;, serif;">Charges in the motion<b><o:p></o:p></b></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Electrons at rest<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Atoms in motion<o:p></o:p></span></p> <p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;">Molecules in motion<o:p></o:p></span></p>
7 An eV is unit of: <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Potential<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Energy<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Work<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt;">Power</span></p> <p class="MsoNormal"><span style="font-size: 12pt; line-height: 107%; font-family: &quot;Times New Roman&quot;, serif;">Both (B) and(C)<b><o:p></o:p></b></span></p>
8 The earth’s potential and potential at infinity are taken: <p class="MsoNormal"><span style="font-size: 12pt; line-height: 107%; font-family: &quot;Times New Roman&quot;, serif;">Equal<b><o:p></o:p></b></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Zero<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">First is greater than the second<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Second is greater than the first<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Both (A) and (B)<o:p></o:p></span></p>
9 Another mean of electric potential energy per unit charge is given by: <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Electric intensity<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Potential gradient<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Electric Flux<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Potential difference<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">None of these<o:p></o:p></span></p>
10 Tick the correct statement: <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Both the potential and potential difference is scalars<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Potential is a scalar but potential difference is a vector<o:p></o:p></span></p> <span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt;">Both are vectors</span><p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast"><o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Potential is vector but potential difference is scalar<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">None of these<o:p></o:p></span></p>
11 The surface destiny of charge is defined is: <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Charge per volume<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Mass per volume<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Charge per area<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Mass per area<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Both (B) and (C)<o:p></o:p></span></p>
12 Gaussian surface is always: <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Rectangular<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Spherical<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Cylindrical<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Box shape<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Any of these<o:p></o:p></span></p>
13 A field free region is found: <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Near the outer surface of a hollow charged metal sphere<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">In the interior of solid metal uncharged sphere<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">In the interior of solid metal charged sphere<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Both (A) and (B)<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Both (A) and (C)<o:p></o:p></span></p>
14

While finding the electric intensity at a point between two oppositely charged parallel plates, the Gaussian surface is taken in the form of a hollow:

 <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Circle<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Rectangle<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Sphere<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Box<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Cylinder<o:p></o:p></span></p>
15 The interior of a hollow charged metal sphere is a region which: <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Contain some magnitude of electric field<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Is full of electric field lines<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Is field-free region<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">Either (A) or (B)<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-fareast-theme-font: minor-fareast">None of these<o:p></o:p></span></p>
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