MCQOPTIONS
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MCQOPTIONS
This section includes 185 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
_When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will$? |
| A. | remain uncharged |
| B. | decrease |
| C. | increase |
| D. | become zero |
| Answer» C. increase | |
| 102. |
_An electrolytic capacitor can be used for$? |
| A. | D.C. only |
| B. | AC. only |
| C. | both D.C. as well as A.C. |
| D. | none of the above |
| Answer» B. AC. only | |
| 103. |
_A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?$? |
| A. | Ceramic capacitor |
| B. | Mica capacitor |
| C. | Both will have identical value of capacitance |
| D. | It depends on applied voltage |
| Answer» B. Mica capacitor | |
| 104. |
_Which of the following expression is correct for electric field strength ?$? |
| A. | E = D/E |
| B. | E = D2/t |
| C. | E = jtD |
| D. | E= nD2 |
| Answer» B. E = D2/t | |
| 105. |
_Which of the following capacitors has relatively shorter shelf life ?$? |
| A. | Mica capacitor |
| B. | Electrolytic capacitor |
| C. | Ceramic capacitor |
| D. | Paper capacitor |
| Answer» C. Ceramic capacitor | |
| 106. |
_Paper condenser is$? |
| A. | always polarised |
| B. | usually of fixed value |
| C. | electrolytic condenser |
| D. | a variable condenser |
| Answer» C. electrolytic condenser | |
| 107. |
_The ohmmeter reading for a short circuited capacitor is$? |
| A. | infinity |
| B. | few kilo ohms |
| C. | few megohms |
| D. | zero |
| Answer» E. | |
| 108. |
_The total deficiency or excess of electrons in a body is known as$? |
| A. | current |
| B. | voltage |
| C. | potential gradient |
| D. | charge |
| Answer» E. | |
| 109. |
_A potential of 400 V is applied to a capacitor, the plates of which are 4 mm apart. The strength of electric field is$? |
| A. | 100 kV/m |
| B. | 10 kV/m |
| C. | 5 kV/m |
| D. | 2 kV/m |
| Answer» B. 10 kV/m | |
| 110. |
Capacitance increases with$? |
| 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 | |
| 111. |
In order to remove static electricity from machinery$? |
| A. | construct insulated cabins |
| B. | insulate the machinery |
| C. | ground the framework |
| D. | humidify the surroundings |
| Answer» D. humidify the surroundings | |
| 112. |
Which of the following capacitors preferred for high frequency circuits ?$? |
| A. | Air capacitor |
| B. | Electrolytic capacitor |
| C. | Mica capacitor |
| D. | none of the above |
| Answer» D. none of the above | |
| 113. |
Electric field intensity is a quantity$? |
| A. | scalar |
| B. | vector |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» C. both (A) and (B) | |
| 114. |
capacitors can be used only for D.C.$? |
| A. | Air |
| B. | Paper |
| C. | Mica |
| D. | Electrolytic |
| Answer» E. | |
| 115. |
The sparking between two electrical contacts can be reduced by inserting a$? |
| A. | capacitor in parallel with contacts |
| B. | capacitor in series with each contact |
| C. | resistance in line |
| D. | none of the above |
| Answer» B. capacitor in series with each contact | |
| 116. |
"The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed".The above statement is associated with$? |
| A. | Coulomb’s square law |
| B. | Gauss’s law |
| C. | Maxwell’s first law |
| D. | Maxwell’s second law |
| Answer» C. Maxwell‚Äö√Ñ√¥s first law | |
| 117. |
The number of Faraday tubes of flux passing through a surface in an electric field is called$? |
| A. | electric flux |
| B. | electric flux density |
| C. | magnetic flux density |
| D. | electric charge density |
| Answer» B. electric flux density | |
| 118. |
A region around a stationary electric charge has$? |
| A. | An electric field |
| B. | A magnetic field |
| C. | Both (A) and (B) |
| D. | None of the above |
| Answer» B. A magnetic field | |
| 119. |
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point.$? |
| A. | Electric intensity |
| B. | Magnetic flux density |
| C. | Electric flux |
| D. | None of the above |
| Answer» B. Magnetic flux density | |
| 120. |
A condenser suitable for D.C. only is$? |
| A. | Metallic plate variable gang condenser |
| B. | Metallic paper capacitor |
| C. | Oil impregnated paper condenser |
| D. | Poled aluminium electrolytic condenser |
| Answer» E. | |
| 121. |
The breakdown voltage for paper capacitors is usually$? |
| A. | 20 to 60 volts |
| B. | 200 to 1600 volts |
| C. | 2000 to 3000 volts |
| D. | more than 10000 volts |
| Answer» C. 2000 to 3000 volts | |
| 122. |
A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?$? |
| A. | Paper capacitor |
| B. | Ceramic capacitor |
| C. | Electrolytic capacitor |
| D. | Any-of the above |
| Answer» D. Any-of the above | |
| 123. |
Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as$? |
| A. | milli-coulomb |
| B. | micro-coulomb |
| C. | pico-coulomb |
| D. | coulomb |
| Answer» C. pico-coulomb | |
| 124. |
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is$? |
| A. | Charged |
| B. | Short-circuited |
| C. | Lossy |
| D. | Satisfactory |
| Answer» C. Lossy | |
| 125. |
Electric displacement is a______quantity.$? |
| A. | scalar |
| B. | vector |
| C. | both of the above |
| D. | none of the above |
| Answer» C. both of the above | |
| 126. |
The power dissipated in a pure capacitor is$? |
| A. | zero |
| B. | proportional to applied voltage |
| C. | proportional to value of capacitance |
| D. | both (B) and (C) above |
| Answer» B. proportional to applied voltage | |
| 127. |
The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be$? |
| A. | 400 N/C |
| B. | 600 N/C |
| C. | 800 N/C |
| D. | 1200 N/C |
| Answer» D. 1200 N/C | |
| 128. |
The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value,$? |
| A. | 37 |
| B. | 42 |
| C. | 63 |
| D. | 73 |
| Answer» B. 42 | |
| 129. |
Electric intensity at any point in an electric field is equal to the at that point.$? |
| A. | electric flux |
| B. | magnetic flux density |
| C. | potential gradient |
| D. | none of the above |
| Answer» D. none of the above | |
| 130. |
For a good 0.05 uF capacitor ohmmeter reading should$? |
| 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 | |
| 131. |
The value of dielectric constant for vacuum is taken as$? |
| A. | zero |
| B. | 1 |
| C. | 4 |
| D. | 10 |
| Answer» C. 4 | |
| 132. |
A field line and an equipotential surface are$? |
| 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 | |
| 133. |
This mention statement is associated with "The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface".$? |
| A. | Gauss's law |
| B. | Kirchhoff's law |
| C. | Faraday's law |
| D. | Lenz's law |
| Answer» B. Kirchhoff's law | |
| 134. |
An uncharged conductor is placed near a charged conductor, then$? |
| 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. |
The relative permittivity of free space is given by$? |
| A. | 1 |
| B. | 10 |
| C. | 100 |
| D. | 1000 |
| Answer» B. 10 | |
| 136. |
The minimum value of potential gradient in a cable occurs in? |
| A. | insulation |
| B. | conductor |
| C. | outer sheath |
| D. | uniformly all over |
| Answer» B. conductor | |
| 137. |
The power dissipated in a pure capacitor is? |
| A. | zero |
| B. | proportional to applied voltage |
| C. | proportional to value of capacitance |
| D. | both (B) and (C) above |
| Answer» B. proportional to applied voltage | |
| 138. |
The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value,? |
| A. | 37 |
| B. | 42 |
| C. | 63 |
| D. | 73 |
| Answer» B. 42 | |
| 139. |
The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be? |
| A. | 400 N/C |
| B. | 600 N/C |
| C. | 800 N/C |
| D. | 1200 N/C |
| Answer» D. 1200 N/C | |
| 140. |
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 | |
| 141. |
This mention statement is associated with "The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface".? |
| A. | Gauss's law |
| B. | Kirchhoff's law |
| C. | Faraday's law |
| D. | Lenz's law |
| Answer» B. Kirchhoff's law | |
| 142. |
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 | |
| 143. |
The value of dielectric constant for vacuum is taken as? |
| A. | zero |
| B. | 1 |
| C. | 4 |
| D. | 10 |
| Answer» C. 4 | |
| 144. |
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 | |
| 145. |
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 | |
| 146. |
Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them |
| A. | all in series |
| B. | all in parallel |
| C. | two in parallel and third in series with this combination |
| D. | two in series and third in parallel across this combination |
| Answer» D. two in series and third in parallel across this combination | |
| 147. |
A capacitance is a circuit component that opposes the change in circuit |
| A. | current |
| B. | voltage |
| C. | impedance |
| D. | none of the above |
| Answer» C. impedance | |
| 148. |
is that property of a capacitor which delays any change of voltage across it. |
| A. | Inductance |
| B. | Capacitance |
| C. | Potential gradient |
| D. | None of the above |
| Answer» C. Potential gradient | |
| 149. |
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 | |
| 150. |
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 | |