MCQOPTIONS
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MCQOPTIONS
This section includes 152 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.
| 101. |
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 | |
| 102. |
If a third equal and similar charge is placed between two equal and similar charges, then this third charge will_____________? |
| A. | move out of the field of influence of the two charges |
| B. | remain in stable equilibrium |
| C. | not be in equilibrium |
| D. | be in unstable equilibrium |
| Answer» C. not be in equilibrium | |
| 103. |
If a charged rod is brought closer to a gas filled balloon then______________? |
| A. | Radius decreases |
| B. | Balloon bursts |
| C. | Radius increase |
| D. | Balloon squeezes |
| Answer» D. Balloon squeezes | |
| 104. |
If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be____________? |
| A. | 800 uC |
| B. | 900 uC |
| C. | 1200 uC |
| D. | 1600 uC |
| Answer» D. 1600 uC | |
| 105. |
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. | |
| 106. |
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 | |
| 107. |
For a good 0.05 uF capacitor ohmmeter reading should___________? |
| A. | show low resistance momentarily and back off to a very high resistance |
| B. | show high resistance momentarily and then a very low resistance |
| C. | go quickly to 50 ohm approximately and remain there |
| D. | not move at all |
| Answer» B. show high resistance momentarily and then a very low resistance | |
| 108. |
____________field is associated with the capacitor? |
| A. | Electric |
| B. | Magnetic |
| C. | Both (A) and (B) |
| D. | None of the above |
| Answer» B. Magnetic | |
| 109. |
Equivalent capacitance is greater than individual capacitances in_____________? |
| A. | series combination |
| B. | parallel combination |
| C. | both series and parallel combinations |
| D. | none of above |
| Answer» C. both series and parallel combinations | |
| 110. |
Equipotential planes are_______________? |
| A. | parallel to one another |
| B. | non parallel to one another |
| C. | intersecting |
| D. | circular |
| Answer» B. non parallel to one another | |
| 111. |
Energy stored in the electric field of a capacitor C when charged from a D.C source of voltage V is equal to joules_______________? |
| A. | CV2 |
| B. | C2V |
| C. | CV2 |
| D. | CV |
| Answer» B. C2V | |
| 112. |
Electric intensity being a vector quantity always points_______________? |
| A. | along the direction of force experienced by a unit positive charge |
| B. | opposite to the direction of force experienced by a unit positive charge |
| C. | perpendicular to the direction of force experienced by a uit positive charge |
| D. | any of above |
| Answer» B. opposite to the direction of force experienced by a unit positive charge | |
| 113. |
Electric intensity at infinite distance from the point charge is_____________? |
| A. | zero |
| B. | infinite |
| C. | positive |
| D. | negative |
| Answer» B. infinite | |
| 114. |
Electric intensity at any point in an electric field is equal to the at that point? |
| A. | electric flux |
| B. | magnetic flux density |
| C. | potential gradient |
| D. | none of the above |
| Answer» D. none of the above | |
| 115. |
Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________? |
| A. | decrease |
| B. | increase |
| C. | remain constant |
| D. | depends upon composition of dielectric |
| Answer» B. increase | |
| 116. |
Electric flux linked with a surface will be maximum when____________? |
| A. | The surface is held parallel to the electric field |
| B. | The surface is held perpendicular to the electric field |
| C. | The surface makes an angle of 45°with the field |
| D. | All of the above |
| Answer» C. The surface makes an angle of 45°with the field | |
| 117. |
Electric flux due to a point charge +q is______________? |
| A. | 1/4IIɛ q/r |
| B. | q/ɛ0 |
| C. | 1/4IIɛ0. q/r2 |
| D. | 4IIɛ0 |
| Answer» C. 1/4IIɛ0. q/r2 | |
| 118. |
Electric field intensity is a quantity_____________? |
| A. | scalar |
| B. | vector |
| C. | both A. and (6) |
| D. | none of the above |
| Answer» C. both A. and (6) | |
| 119. |
Electric displacement is a__________quantity |
| A. | scalar |
| B. | vector |
| C. | both of the above |
| D. | none of the above |
| Answer» C. both of the above | |
| 120. |
Dielectric strength _________ with increasing thickness |
| A. | increases |
| B. | decreases |
| C. | remains unaltered |
| D. | none of the above |
| Answer» C. remains unaltered | |
| 121. |
Dielectric strength of mica is___________? |
| A. | 10 to 20 kV/mm |
| B. | 30 to 50 kV/mm |
| C. | 50 to 200 kV/mm |
| D. | 300 to 500 kV/mm |
| Answer» D. 300 to 500 kV/mm | |
| 122. |
Dielectric strength of a medium is usually expressed in____________? |
| A. | J/mm |
| B. | C/m2 |
| C. | kV/mm |
| D. | N/mm |
| Answer» D. N/mm | |
| 123. |
Dielectric strength of medium____________? |
| A. | increases with rise in temperature |
| B. | increases with moisture content |
| C. | is same for all insulating materials |
| D. | none of the above |
| Answer» E. | |
| 124. |
Dielectric strength of a material depends on_____________? |
| A. | moisture content |
| B. | temperature |
| C. | thickness |
| D. | all of the above |
| E. | none of the above |
| Answer» E. none of the above | |
| 125. |
Dielectric constant for mica is nearly_____________? |
| A. | 200 |
| B. | 100 |
| C. | 3 to 8 |
| D. | 1 to 2 |
| Answer» D. 1 to 2 | |
| 126. |
capacitors can be used only for D.C ? |
| A. | Air |
| B. | Paper |
| C. | Mica |
| D. | Electrolytic |
| Answer» E. | |
| 127. |
capacitors are used in transistor circuits? |
| A. | Ceramic |
| B. | Paper |
| C. | Air |
| D. | Electrolytic |
| Answer» B. Paper | |
| 128. |
capacitors are mainly used for radio frequency tuning? |
| A. | Paper |
| B. | Air |
| C. | Mica |
| D. | Electrolytic |
| Answer» C. Mica | |
| 129. |
capacitors are used for audio frequency and radio frequency coupling and tuning ? |
| A. | Air |
| B. | Mica |
| C. | Plastic film |
| D. | Ceramic |
| Answer» C. Plastic film | |
| 130. |
capacitor is to have an energy content of 20J it must be placed across a potential difference of________________? |
| A. | 4 volts |
| B. | 9 volts |
| C. | 2 volts |
| D. | 1 vol |
| Answer» D. 1 vol | |
| 131. |
Capacitance increases with_____________? |
| A. | increase in plate area and decrease in distance between the plates |
| B. | increase in plate area and distance between the plates |
| C. | decrease in plate area and value of applied voltage |
| D. | reduction in plate area and distance between the plates |
| Answer» B. increase in plate area and distance between the plates | |
| 132. |
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point ? |
| A. | Electric intensity |
| B. | Magnetic flux density |
| C. | Electric flux |
| D. | None of the above |
| Answer» B. Magnetic flux density | |
| 133. |
at a point is equal to the negative potential gradient at that point? |
| A. | Electric intensity |
| B. | Electric flux |
| C. | Magnetic flux |
| D. | Magnetic flux density |
| Answer» B. Electric flux | |
| 134. |
An uncharged conductor is placed near a charged conductor, then_____________? |
| A. | the uncharged conductor gets charged by conduction |
| B. | the uncharged conductor gets charged by induction and then attracted towards the charging body |
| C. | the uncharged conductor is attracted first and then charged by induction |
| D. | it remains as such |
| Answer» C. the uncharged conductor is attracted first and then charged by induction | |
| 135. |
An electrolytic capacitor is generally made to provide__________? |
| A. | low capacitance |
| B. | fixed capacitance |
| C. | variable capacitance |
| D. | large value of capacitance |
| Answer» E. | |
| 136. |
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 | |
| 137. |
An electric field can deflect_______________? |
| A. | Neutrons |
| B. | X-rays |
| C. | Both glass rod and silk acquire a negative charge |
| D. | None |
| Answer» E. | |
| 138. |
An electric charge at rest produces_______________? |
| A. | only a magnetic field |
| B. | only an electric field |
| C. | neither electric field nor magnetic field |
| D. | both electric and magnetic fields |
| Answer» C. neither electric field nor magnetic field | |
| 139. |
Air capacitors are generally available in the range_________? |
| A. | 10 to 400 pF |
| B. | 1 to 20 pF |
| C. | 100 to 900 pF |
| D. | 20 to 100 pF |
| Answer» B. 1 to 20 pF | |
| 140. |
Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as_____________? |
| A. | milli-coulomb |
| B. | micro-coulomb |
| C. | pico-coulomb |
| D. | coulomb |
| Answer» C. pico-coulomb | |
| 141. |
A unit tube of flux is known as tube___________? |
| A. | Newton |
| B. | Faraday |
| C. | Michale |
| D. | None of the above |
| Answer» C. Michale | |
| 142. |
A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is____________? |
| A. | 62 x 105 V/m |
| B. | 72 x 105 V/m |
| C. | 82 x 105 V/m |
| D. | 92 x 105 V/m |
| Answer» C. 82 x 105 V/m | |
| 143. |
A region around a stationary electric charge has__________? |
| A. | an electric field |
| B. | a magnetic field |
| C. | both A. and (b) |
| D. | none of the above |
| Answer» B. a magnetic field | |
| 144. |
A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is___________? |
| A. | 100 kV/m |
| B. | 10 kV/m |
| C. | 5 kV/m |
| D. | 2 kV/m |
| Answer» B. 10 kV/m | |
| 145. |
A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be________________? |
| A. | 5 times smaller than before |
| B. | 5 times greater than before |
| C. | 10 times greater than before |
| D. | 25 times larger than before |
| Answer» E. | |
| 146. |
A paper capacitor is usually available in the form of_____________? |
| A. | tubes |
| B. | rolled foil |
| C. | disc |
| D. | meshed plates |
| Answer» C. disc | |
| 147. |
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance _______? |
| A. | Ceramic capacitor |
| B. | Mica capacitor |
| C. | Both will have identical value of capacitance |
| D. | It depends on applied voltage |
| Answer» B. Mica capacitor | |
| 148. |
A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be_________________? |
| A. | 900 volts |
| B. | 9000 volts |
| C. | 90 volts |
| D. | zero |
| Answer» C. 90 volts | |
| 149. |
A gang condenser is a____________? |
| A. | polarised capacitor |
| B. | variable capacitor |
| C. | ceramic capacitor |
| D. | none of the above |
| Answer» C. ceramic capacitor | |
| 150. |
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 | |