MCQOPTIONS
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MCQOPTIONS
This section includes 180 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will__________? |
| A. | decrease |
| B. | increase |
| C. | remains unchanged |
| D. | become zero |
| Answer» C. remains unchanged | |
| 152. |
Which of the following statements is incorrect _________________? |
| A. | The leakage resistance of ceramic capacitors is generally high |
| B. | The stored energy in a capacitor decreases with reduction in value of capacitance |
| C. | The stored energy in a capacitor increases with applied voltage |
| D. | A wire cable has distributed capacitance between the conductors |
| Answer» C. The stored energy in a capacitor increases with applied voltage | |
| 153. |
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is_____________? |
| A. | 0.024 F |
| B. | 0.12 F |
| C. | 0.6 F |
| D. | 0.8 F |
| Answer» B. 0.12 F | |
| 154. |
If three 15 uF capacitors are connected in series, the net capacitance is |
| A. | 5 uF |
| B. | 30 uF |
| C. | 45 uF |
| D. | 50 uF |
| Answer» B. 30 uF | |
| 155. |
The direction of electric field due +0 positive charge is ___________? |
| A. | away from the charge |
| B. | towards the charge |
| C. | both A. and (b) |
| D. | none of the above |
| Answer» B. towards the charge | |
| 156. |
A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is___________? |
| A. | 0.024 F |
| B. | 0.12 F |
| C. | 0.6 F |
| D. | 0.8 F |
| Answer» B. 0.12 F | |
| 157. |
Which of the following capacitors will have the least variation ____________? |
| A. | Paper capacitor |
| B. | Ceramic capacitor |
| C. | Silver plated mica capacitor |
| D. | None of the above |
| Answer» D. None of the above | |
| 158. |
Which of the following materials has the highest value of dielectric constant___________? |
| A. | Glass |
| B. | Vacuum |
| C. | Ceramics |
| D. | Oil |
| Answer» E. | |
| 159. |
Which of the following statements is correct ___________? |
| A. | Air capacitors have a black band to indicate the outside foil |
| B. | Electrolytic capacitor must be connected in the correct polarity |
| C. | Ceramic capacitors must be connected in the correct polarity |
| D. | Mica capacitors are available in capacitance value of 1 to 10 pF |
| Answer» C. Ceramic capacitors must be connected in the correct polarity | |
| 160. |
Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________? |
| A. | 50 |
| B. | 100 |
| C. | 150 |
| D. | 200 |
| Answer» C. 150 | |
| 161. |
The capacitance of a capacitor is not affected by____________? |
| A. | distance between plates |
| B. | area of plates |
| C. | thickness of plates |
| D. | all of the above |
| Answer» D. all of the above | |
| 162. |
If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because__________________? |
| A. | varying voltage produces the charging and dicharging currents |
| B. | of high peak value |
| C. | charging current can flow |
| D. | discharge current can flow |
| Answer» B. of high peak value | |
| 163. |
A dielectric material must be____________? |
| A. | resistor |
| B. | insulator |
| C. | good conductor |
| D. | semi conductor |
| Answer» C. good conductor | |
| 164. |
If three 10 uF capacitors are connected in parallel, the net cararitance is___________? |
| A. | 20 uF |
| B. | 30 uE |
| C. | 40 uF |
| D. | 50 uF |
| Answer» C. 40 uF | |
| 165. |
The units of capacitance are____________? |
| A. | volts/coulomb |
| B. | coulombs/volt |
| C. | ohms |
| D. | henry/Wb |
| Answer» C. ohms | |
| 166. |
Which of the following capacitors has relatively shorter shelf life____________? |
| A. | Mica capacitor |
| B. | Electrolytic capacitor |
| C. | Ceramic capacitor |
| D. | Paper capacitor |
| Answer» C. Ceramic capacitor | |
| 167. |
Which of the following expression is correct for electric field strength___________? |
| A. | E = D/E |
| B. | E = D2/t |
| C. | E = jtD |
| D. | E= nD2 |
| Answer» B. E = D2/t | |
| 168. |
For which of the following parameter variation, the capacitance of the capacitor remains unaffected ____________? |
| A. | Distance between plates |
| B. | Area of the plates |
| C. | Nature of dielectric |
| D. | Thickness of the plates |
| Answer» E. | |
| 169. |
Which of the following statement is true __________? |
| A. | The current in the discharging capacitor grows linearly |
| B. | The current in the dicharging capacitor grows exponentially |
| C. | The current in the discharging capacitor decays exponentially |
| D. | The current in the discharging capacitor decreases constantly |
| Answer» C. The current in the discharging capacitor decays exponentially | |
| 170. |
For making a capacitor, it is better to select a dielectric having___________? |
| A. | low permittivity |
| B. | high permittivity |
| C. | permittivity same as that of air |
| D. | permittivity slightly more than that of air |
| Answer» C. permittivity same as that of air | |
| 171. |
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________? |
| A. | Voltage across the plates increases |
| B. | voltage across the plates decreases |
| C. | charge on the capacitor decreases |
| D. | charge on the capacitor increases |
| Answer» C. charge on the capacitor decreases | |
| 172. |
In a capacitor the electric charge is stored in____________? |
| A. | metal plates |
| B. | dielectric |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» C. both (A) and (B) | |
| 173. |
A field line and an equipotential surface are____________? |
| A. | always parallel |
| B. | always at 90° |
| C. | inclined at any angle 0 |
| D. | none of the above |
| Answer» C. inclined at any angle 0 | |
| 174. |
The ability of charged bodies to exert force on 6ne another is attributed to the existence of____________? |
| A. | electrons |
| B. | protons |
| C. | neutrons |
| D. | electric field |
| Answer» E. | |
| 175. |
“The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed”. The above statement is associated with____________? |
| A. | Coulomb’s square law |
| B. | Gauss’s law |
| C. | Maxwell’s first law |
| D. | Maxwell’s second law |
| Answer» C. Maxwell’s first law | |
| 176. |
The force between two charges is 120 N. If the distance between the charges is doubled, the force will be________________? |
| A. | 60 N |
| B. | 30 N |
| C. | 40 N |
| D. | 15 N |
| Answer» C. 40 N | |
| 177. |
The electric field at a point situated at a distance d from straight charged conductor is____________? |
| A. | proportional to d |
| B. | inversely proportional to d |
| C. | inversely proportional to d |
| D. | none of the above |
| Answer» C. inversely proportional to d | |
| 178. |
An electrolytic capacitor can be used for_____________? |
| A. | D.C. only |
| B. | AC. only |
| C. | both D.C. as well as A.C. |
| Answer» B. AC. only | |
| 179. |
Which of the following is not a vector ___________? |
| A. | Linear momentum |
| B. | Angular momentum |
| C. | Electric field |
| D. | Electric potential |
| Answer» C. Electric field | |
| 180. |
The lines of force due to charged particles are_________? |
| A. | always straight |
| B. | always curved |
| C. | sometimes curved |
| D. | none of the above |
| Answer» C. sometimes curved | |