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Physics ECAT Pre Engineering Chapter 13 Current Electricity Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | Static electricity is produced by the transfer of: | <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Electrons<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Protons<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">One fluid<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Two fluids<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">None of these<o:p></o:p></span></p> |
| 2 | Electrostatics is the branch of physics which
deals with the study of electro charges: |
<p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">At rest<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">At rest under the action of electric forces<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">In motion under the action of electric forces<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">In motion<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">At rest under the action of nuclear forces<o:p></o:p></span></p> |
| 3 | In case of two identical charges placed certain
distance apart, the electric field lines are: |
<p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Straight lines<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Sine curves<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Curved<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Both (A) and (B)<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">None of these<o:p></o:p></span></p> |
| 4 | Field lines are closer to each other in the region where the field is: | <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Stronger<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Weaker<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Much weaker<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Absent<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">None of these<o:p></o:p></span></p> |
| 5 | Electric field lines emerge from the charge in: | <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">One dimension<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Two dimensions<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 12pt; line-height: 107%; font-family: "Times New Roman", serif;">Three dimensions<b><o:p></o:p></b></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">Four dimensions<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%;font-family: "Times New Roman","serif"">None of them<o:p></o:p></span></p> |
| 6 | The value of relative permittivity of different dielectrics are: | <p class="MsoNormal"><span style="font-family: "Times New Roman", serif; font-size: 16px;">Equal</span></p> <p class="MsoNormal"><span style="font-family: "Times New Roman", serif; font-size: 16px;">Different</span></p> <p class="MsoNormal"><span style="font-family: "Times New Roman", serif; font-size: 16px;">Greater than one</span></p> <p class="MsoNormal"><span style="font-family: "Times New Roman", serif; font-size: 16px;">Smaller than one</span></p> <p class="MsoNormal"><b><span style="font-size:12.0pt;line-height:107%;font-family:"Times New Roman","serif"">Both (B) and (C)<o:p></o:p></span></b></p> |
| 7 | A current of 1 ampere is passing through a conductor. The charge passing through it in half a minute s | One coulomb 0.5 coulomb 30 coulombs 2 coulombs None of these |
| 8 | The conventional current is the name given to current due to flow of | Positrons Positive charges Negative charges Both A and C None of these |
| 9 | In case of metallic conductors, the charge carriers are | Protons Electrons Antiprotons Positrons Both A and B |
| 10 | The charge carriers in an electrolyte are | Positive ions Negative ions Either A or B Both A and B Neither A nor B |
| 11 | In case of metallic conductors, the charge carriers are | Protons Electrons Antiprotons Positrons Both A and B |
| 12 | SI unit of current describes the flow of charge at the rate of | One ampere per second One coulomb per second One electron per second 6.25 x 10<sup>18</sup>electrons per second Both B and D |
| 13 | The current that flows through the coil of a motor causes | Its shaft to revolve Its brushes to rotate Motor to move Its shaft to rotate None of these |
| 14 | Most practical applications of electricity involve | Charges at rest Charges in motion Electrons at rest Atoms in motion Molecules in motion |
| 15 | Which of the following substances has got positive temperature coefficient of resistance? | Carbon Germanium Silicon Aluminium None of these |
| 16 | A thermistor is a resistor which is: | Light Sensitive Heat Sensitive Sound Sensitive All of these None of these |
| 17 | Thermistors are prepared under | High pressure and low temperature High pressure and high temperature Low pressure and low temperature Low pressure and high temprature None of these |
| 18 | The emf is measured in: | Newton Volt J/C Both A and B Both B and C |
| 19 | The quantity having the same unit as that of emf is: | Force Energy Potential Current Charge |
| 20 | Which instrument is expensive and difficult to use? | Voltmeter Potentiometer CRO Both A and C Both A and B |
| 21 | An ideal voltmeter has: | Zero resistance Small resistance Large resistance Infinite resistance Both A and B |
| 22 | Kirchhoff's first rule is also called: | Loop rule Thumb rule Point rule Right hand rule None of these |
| 23 | The third band of the colour code: | Gives the number of zeroes Is decimal multiplier Gives the resistance tolerance Gives the third digit Both (A) and (B) |
| 24 | A rheostat can e used: | As variable resistor As potential divider For varying the current All of these None of these |
| 25 | The best conductor is: | Silver Copper Aluminimum Both B and C None of them |
| 26 | As the current flows through the wire | It generates heat in the wire It produces sound in the wire Resistance of the wire decrease Voltage across the ends is the increase None of these |
| 27 | The fourth band is a: | Silver band Red band Gold band Either A or C Either A or B |
| 28 | The value of resistivity is the least for: | Copper Aluminimum Silver Tungsten Iron |
| 29 | In a metal, the valence electrons are: | Attached to individual atoms Not attached to individual atoms Free to move within the metal Both A and B Both A and C |
| 30 | In gases, the charge carriers are: | Electrons Positive ions Negative ions Both A and C Both A and B |
