MCQOPTIONS
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MCQOPTIONS
This section includes 88 Mcqs, each offering curated multiple-choice questions to sharpen your BITSAT knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the case of a lossy capacitor, its series equivalent resistance value will be |
| A. | mall |
| B. | ery small |
| C. | arge |
| D. | ero |
| Answer» D. ero | |
| 2. |
Which of the following capacitor is preferred in case of single phase motor ? |
| A. | ica capacitor |
| B. | aper capacitor |
| C. | lectrolytic capacitor |
| D. | eramic capacitor |
| Answer» D. eramic capacitor | |
| 3. |
Which of the following capacitors has relatively shorter shelf life ? |
| A. | ica capacitor |
| B. | lectrolytic capacitor |
| C. | eramic capacitor |
| D. | aper capacitor |
| Answer» C. eramic capacitor | |
| 4. |
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. | auss's law |
| B. | irchhoff's law |
| C. | araday's law |
| D. | enz's law |
| Answer» B. irchhoff's law | |
| 5. |
1 volt/meter is same as |
| A. | meter/coulomb |
| B. | newton/meter |
| C. | newton/coulomb |
| D. | joule/coulomb |
| Answer» D. joule/coulomb | |
| 6. |
The dielectric constant (relative permittivity) of glass is given by |
| A. | .1 to 0.4 |
| B. | .5 to 1.0 |
| C. | .0 to 4.0 |
| D. | to 100 |
| Answer» E. | |
| 7. |
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. | 00 kV/m |
| B. | 0 kV/m |
| C. | kV/m |
| D. | kV/m |
| Answer» B. 0 kV/m | |
| 8. |
Electric intensity at any point in an electric field is equal to the at that point. |
| A. | lectric flux |
| B. | agnetic flux density |
| C. | otential gradient |
| D. | one of the above |
| Answer» D. one of the above | |
| 9. |
A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The time constant of the circuit is |
| A. | .2 s |
| B. | .4 s |
| C. | .6 s |
| D. | .8 s |
| Answer» E. | |
| 10. |
The direction of electric field due +0 positive charge is . |
| A. | way from the charge |
| B. | owards the charge |
| C. | oth (A) and (B) |
| D. | one of the above |
| Answer» B. owards the charge | |
| 11. |
Paper condenser is |
| A. | lways polarised |
| B. | sually of fixed value |
| C. | lectrolytic condenser |
| D. | variable condenser |
| Answer» C. lectrolytic condenser | |
| 12. |
A field line and an equipotential surface are |
| A. | lways parallel |
| B. | lways at 90° |
| C. | nclined at any angle 0 |
| D. | one of the above |
| Answer» C. nclined at any angle 0 | |
| 13. |
Which of the following is not a vector ? |
| A. | inear momentum |
| B. | ngular momentum |
| C. | lectric field |
| D. | lectric potential |
| Answer» E. | |
| 14. |
The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be |
| A. | 6 x 10 fa |
| B. | 6 x 107 N |
| C. | 6 x 108 N |
| D. | 6 x 109 N |
| Answer» E. | |
| 15. |
The total deficiency or excess of electrons in a body is known as |
| A. | urrent |
| B. | oltage |
| C. | otential gradient |
| D. | harge |
| Answer» E. | |
| 16. |
For a good 0.05 uF capacitor ohmmeter reading should |
| A. | how low resistance momentarily and back off to a very high resistance |
| B. | how high resistance momentarily and then a very low resistance |
| C. | o quickly to 50 ohm approximately and remain there |
| D. | ot move at all |
| Answer» B. how high resistance momentarily and then a very low resistance | |
| 17. |
The property of a capacitor to store electricity is called its |
| A. | apacitance |
| B. | harge |
| C. | nergy |
| D. | one of the above |
| Answer» B. harge | |
| 18. |
Which of the following expression is correct for electric field strength ? |
| A. | = D/E |
| B. | = D2/t |
| C. | = jtD |
| D. | 0 |
| Answer» B. = D2/t | |
| 19. |
An uncharged conductor is placed near a charged conductor, then |
| A. | he uncharged conductor gets charged by conduction |
| B. | he uncharged conductor gets charged by induction and then attracted towards the charging body |
| C. | he uncharged conductor is attracted first and then charged by induction |
| D. | t remains as such |
| Answer» C. he uncharged conductor is attracted first and then charged by induction | |
| 20. |
The capacitor preferred for high frequency circuits is |
| A. | ir capacitor |
| B. | ica capacitor |
| C. | lectrolytic capacitor |
| D. | one of the above |
| Answer» C. lectrolytic capacitor | |
| 21. |
For which of the following parameter variation, the capacitance of the capacitor remains unaffected ? |
| A. | istance between plates |
| B. | rea of the plates |
| C. | ature of dielectric |
| D. | hickness of the plates |
| Answer» E. | |
| 22. |
The ohmmeter reading for a short circuited capacitor is |
| A. | nfinity |
| B. | ew kilo ohms |
| C. | ew megohms |
| D. | ero |
| Answer» E. | |
| 23. |
Out of the following capacitors of identical rating which one will have the smallest dimensions ? |
| A. | luminium foil capacitor |
| B. | ica capacitor |
| C. | eramic capacitor |
| D. | aper capacitor |
| Answer» D. aper capacitor | |
| 24. |
A unit tube of flux is known as tube |
| A. | ewton |
| B. | araday |
| C. | ichale |
| D. | one of the above |
| Answer» C. ichale | |
| 25. |
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ? |
| A. | eramic capacitor |
| B. | ica capacitor |
| C. | oth will have identical value of capacitance |
| D. | t depends on applied voltage |
| Answer» B. ica capacitor | |
| 26. |
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. | 00 N/C |
| B. | 00 N/C |
| C. | 00 N/C |
| D. | 200 N/C |
| Answer» D. 200 N/C | |
| 27. |
A paper capacitor is usually available in the form of |
| A. | ubes |
| B. | olled foil |
| C. | isc |
| D. | eshed plates |
| Answer» C. isc | |
| 28. |
A capacitor consists of two |
| A. | eramic plates and one mica disc |
| B. | nsulators separated by a dielectric |
| C. | ilver-coated insulators |
| D. | onductors separated by an insulator |
| Answer» E. | |
| 29. |
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. | 7 |
| B. | 2 |
| C. | 3 |
| D. | 3 |
| Answer» B. 2 | |
| 30. |
Dielectric strength of a medium is usually expressed in |
| A. | /mm |
| B. | /m² |
| C. | V/mm |
| D. | /mm |
| Answer» D. /mm | |
| 31. |
The value of E within the field due to a point charge can be found with the help of |
| A. | araday’s laws |
| B. | irchhoff's laws |
| C. | oulomb’s laws |
| D. | one of the above |
| Answer» D. one of the above | |
| 32. |
The number of Faraday tubes of flux passing through a surface in an electric field is called |
| A. | lectric flux |
| B. | lectric flux density |
| C. | agnetic flux density |
| D. | lectric charge density |
| Answer» B. lectric flux density | |
| 33. |
The capacity of capacitor bank used in power factor correction is expressed in terms of |
| A. | W |
| B. | VA |
| C. | VAR |
| D. | olts |
| Answer» D. olts | |
| 34. |
When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of |
| A. | joules |
| B. | joules |
| C. | joules |
| D. | joules |
| Answer» E. | |
| 35. |
Permittivity is expressed in |
| A. | arad/sq-m |
| B. | arad/meter |
| C. | eber/meter |
| D. | eber/sq-m |
| Answer» C. eber/meter | |
| 36. |
Mica capacitors are characterised by all of the following except |
| A. | table operation |
| B. | ccurate value |
| C. | ow leakage reactance |
| D. | ow losses |
| Answer» D. ow losses | |
| 37. |
If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will |
| A. | ecrease |
| B. | ncrease |
| C. | emains unchanged |
| D. | ecome zero |
| Answer» C. emains unchanged | |
| 38. |
Capacitance increases with |
| A. | ncrease in plate area and decrease in distance between the plates |
| B. | ncrease in plate area and distance between the plates |
| C. | ecrease in plate area and value of applied voltage |
| D. | eduction in plate area and distance between the plates |
| Answer» B. ncrease in plate area and distance between the plates | |
| 39. |
Which is the most superior dielectric out of the following ? |
| A. | ir |
| B. | lass |
| C. | akelite |
| D. | aper |
| Answer» D. aper | |
| 40. |
“The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”.The above statement is associated with |
| A. | auss’s law |
| B. | irchhoff's law |
| C. | araday’s law |
| D. | enz’s law |
| Answer» B. irchhoff's law | |
| 41. |
"The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed".The above statement is associated with |
| A. | oulomb’s square law |
| B. | auss’s law |
| C. | axwell’s first law |
| D. | axwell’s second law |
| Answer» C. axwell’s first law | |
| 42. |
If a third equal and similar charge is placed between two equal and similar charges, then this third charge will |
| A. | ove out of the field of influence of the two charges |
| B. | emain in stable equilibrium |
| C. | ot be in equilibrium |
| D. | e in unstable equilibrium |
| Answer» C. ot be in equilibrium | |
| 43. |
capacitors are mainly used for radio frequency tuning. |
| A. | aper |
| B. | ir |
| C. | ica |
| D. | lectrolytic |
| Answer» C. ica | |
| 44. |
Dielectric strength ______ with increasing thickness |
| A. | ncreases |
| B. | ecreases |
| C. | emains unaltered |
| D. | one of the above |
| Answer» C. emains unaltered | |
| 45. |
The minimum value of potential gradient in a cable occurs in |
| A. | nsulation |
| B. | onductor |
| C. | uter sheath |
| D. | niformly all over |
| Answer» B. onductor | |
| 46. |
The force between two charges is 120 N. If the distance between the charges is doubled, the force will be |
| A. | 0 N |
| B. | 0 N |
| C. | 0 N |
| D. | 5 N |
| Answer» C. 0 N | |
| 47. |
When a dielectric is placed in an electric field the field strength |
| A. | ecreases |
| B. | ncreases |
| C. | educes to zero |
| D. | emain unchanged |
| Answer» B. ncreases | |
| 48. |
at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point. |
| A. | lectric intensity |
| B. | agnetic flux density |
| C. | lectric flux |
| D. | one of the above |
| Answer» B. agnetic flux density | |
| 49. |
Dielectric strength of medium |
| A. | ncreases with rise in temperature |
| B. | ncreases with moisture content |
| C. | s same for all insulating materials |
| D. | one of the above |
| Answer» E. | |
| 50. |
The dissipation factor of a good dielectric is of the order of |
| A. | 0.0002 |
| B. | 0.002 |
| C. | 0.02 |
| D. | 0.2 |
| Answer» B. 0.002 | |