MCQOPTIONS
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MCQOPTIONS
This section includes 122 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Temperature coefficient of resistance is expressed in terms of%! |
| A. | ohms/°C |
| B. | mhos/ohm°C |
| C. | ohms/ohm°C |
| D. | mhos/°C |
| Answer» D. mhos/¬¨‚àûC | |
| 2. |
Varistors are%! |
| A. | Insulators |
| B. | Nonlinear resistors |
| C. | Carbon resistors |
| D. | Resistors with zero temperature coefficients |
| Answer» C. Carbon resistors | |
| 3. |
Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.%! |
| A. | Reactor |
| B. | Capacitor |
| C. | Inductor |
| D. | Resistor |
| Answer» E. | |
| 4. |
Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners?%! |
| A. | 3/2 Q |
| B. | 6 Q |
| C. | 4 Q |
| D. | 8/3 Q |
| Answer» D. 8/3 Q | |
| 5. |
All of the following are equivalent to watt except%! |
| A. | (Amperes) ohm |
| B. | Joules/sec. |
| C. | Amperes √ó volts |
| D. | Amperes/volt |
| Answer» E. | |
| 6. |
When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is%! |
| A. | 1 n-mho |
| B. | 106 mho |
| C. | 1 milli-mho |
| D. | None of the above |
| Answer» B. 106 mho | |
| 7. |
The thickness of insulation provided on the conductor depends on%! |
| A. | The magnitude of voltage on the conductor |
| B. | The magnitude of current flowing through it |
| C. | Both (A) and (B) |
| D. | None of the above |
| Answer» B. The magnitude of current flowing through it | |
| 8. |
Resistance of carbon filament lamp as the applied voltage increases.%! |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | None of the above |
| Answer» C. Remains same | |
| 9. |
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will:%! |
| A. | Decrease |
| B. | Increase |
| C. | Remain same |
| D. | Heater will burn out |
| Answer» C. Remain same | |
| 10. |
A rheostat differs from potentiometer in the respect that it%! |
| A. | Has lower wattage rating |
| B. | Has higher wattage rating |
| C. | Has large number of turns |
| D. | Offers large number of tapping |
| Answer» C. Has large number of turns | |
| 11. |
If the efficiency of a machine is to be high, what should be low?%! |
| A. | Input power |
| B. | Losses |
| C. | True component of power |
| D. | kWh consumed |
| Answer» C. True component of power | |
| 12. |
Ohm's law is not applicable to%! |
| A. | Semiconductors |
| B. | D.C. circuits |
| C. | Small resistors |
| D. | High currents |
| Answer» B. D.C. circuits | |
| 13. |
What is the answer to this question? The resistance of a few meters of wire conductor in closed electrical circuit is%! |
| A. | Practically zero |
| B. | Low |
| C. | High |
| D. | Very high |
| Answer» B. Low | |
| 14. |
Switching of a lamp in house produces noise in the radio. This is because switching operation produces%! |
| A. | Arcs across separating contacts |
| B. | Mechanical noise of high intensity |
| C. | Both mechanical noise and arc between contacts |
| D. | None of the above |
| Answer» B. Mechanical noise of high intensity | |
| 15. |
When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is%! |
| A. | A.C. |
| B. | D.C. |
| C. | Any of above two |
| D. | None of the above |
| Answer» C. Any of above two | |
| 16. |
Which one of the following does not have negative temperature coefficient?%! |
| A. | Aluminium |
| B. | Paper |
| C. | Rubber |
| D. | Mica |
| Answer» B. Paper | |
| 17. |
*/*_The filament of an electric bulb is made of? |
| A. | Carbon |
| B. | Aluminium |
| C. | Tungsten |
| D. | Nickel |
| Answer» D. Nickel | |
| 18. |
*/*_Which of the following statement is true both for a series and a parallel D.C. circuit?? |
| A. | Elements have individual currents |
| B. | Currents are additive |
| C. | Voltages are additive |
| D. | Power are additive |
| Answer» E. | |
| 19. |
*/*_If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes? |
| A. | 0.4 ohm |
| B. | 0.6 ohm |
| C. | 0.8 ohm |
| D. | 1.0 ohm |
| Answer» B. 0.6 ohm | |
| 20. |
*/*_The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other?? |
| A. | 18 Q |
| B. | 36 Q |
| C. | 48 Q |
| D. | 64 Q |
| Answer» C. 48 Q | |
| 21. |
*/*_Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct?? |
| A. | 100 W lamp will glow brighter |
| B. | 40 W lamp will glow brighter |
| C. | Both lamps will glow equally bright |
| D. | 40 W lamp will fuse |
| Answer» C. Both lamps will glow equally bright | |
| 22. |
*/*_International ohm is defined in terms of the resistance of? |
| A. | A column of mercury |
| B. | A cube of carbon |
| C. | A cube of copper |
| D. | The unit length of wire |
| Answer» B. A cube of carbon | |
| 23. |
*/*_Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners?? |
| A. | 3/2 Q |
| B. | 6 Q |
| C. | 4 Q |
| D. | 8/3 Q |
| Answer» D. 8/3 Q | |
| 24. |
*/*_The thickness of insulation provided on the conductor depends on? |
| A. | The magnitude of voltage on the conductor |
| B. | The magnitude of current flowing through it |
| C. | Both (A) and (B) |
| D. | None of the above |
| Answer» B. The magnitude of current flowing through it | |
| 25. |
*/*_Resistance of carbon filament lamp as the applied voltage increases.? |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | None of the above |
| Answer» C. Remains same | |
| 26. |
*/*_All of the following are equivalent to watt except? |
| A. | (Amperes) ohm |
| B. | Joules/sec. |
| C. | Amperes √ó volts |
| D. | Amperes/volt |
| Answer» E. | |
| 27. |
*/*_When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is? |
| A. | 1 n-mho |
| B. | 106 mho |
| C. | 1 milli-mho |
| D. | None of the above |
| Answer» B. 106 mho | |
| 28. |
*/*_A rheostat differs from potentiometer in the respect that it? |
| A. | Has lower wattage rating |
| B. | Has higher wattage rating |
| C. | Has large number of turns |
| D. | Offers large number of tapping |
| Answer» C. Has large number of turns | |
| 29. |
*/*_If the efficiency of a machine is to be high, what should be low?? |
| A. | Input power |
| B. | Losses |
| C. | True component of power |
| D. | kWh consumed |
| Answer» C. True component of power | |
| 30. |
*/*_A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will:? |
| A. | Decrease |
| B. | Increase |
| C. | Remain same |
| D. | Heater will burn out |
| Answer» C. Remain same | |
| 31. |
*/*_Ohm's law is not applicable to? |
| A. | Semiconductors |
| B. | D.C. circuits |
| C. | Small resistors |
| D. | High currents |
| Answer» B. D.C. circuits | |
| 32. |
*/*_When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is? |
| A. | A.C. |
| B. | D.C. |
| C. | Any of above two |
| D. | None of the above |
| Answer» C. Any of above two | |
| 33. |
*/*_Switching of a lamp in house produces noise in the radio. This is because switching operation produces? |
| A. | Arcs across separating contacts |
| B. | Mechanical noise of high intensity |
| C. | Both mechanical noise and arc between contacts |
| D. | None of the above |
| Answer» B. Mechanical noise of high intensity | |
| 34. |
*/*_Which one of the following does not have negative temperature coefficient?? |
| A. | Aluminium |
| B. | Paper |
| C. | Rubber |
| D. | Mica |
| Answer» B. Paper | |
| 35. |
*/*_What is the answer to this question? The resistance of a few meters of wire conductor in closed electrical circuit is? |
| A. | Practically zero |
| B. | Low |
| C. | High |
| D. | Very high |
| Answer» B. Low | |
| 36. |
*/*_A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is? |
| A. | 6.4 A, 6.9 A |
| B. | 6.4 A, 9.6 A |
| C. | 4.6 A, 6.9 A |
| D. | 4.6 A, 9.6 A |
| Answer» C. 4.6 A, 6.9 A | |
| 37. |
*/*_For which of the following 'ampere second' could be the unit?? |
| A. | Reluctance |
| B. | Charge |
| C. | Power |
| D. | Energy |
| Answer» C. Power | |
| 38. |
%_A thermistor has_% |
| A. | Positive temperature coefficient |
| B. | Negative temperature coefficient |
| C. | Zero temperature coefficient |
| D. | Variable temperature coefficient |
| Answer» D. Variable temperature coefficient | |
| 39. |
%_Conductance: mho ::_% |
| A. | Resistance : ohm |
| B. | Capacitance : Henry |
| C. | Inductance : farad |
| D. | lumen : steradian |
| Answer» B. Capacitance : Henry | |
| 40. |
_ One Newton meter is same as$? |
| A. | One watt |
| B. | One joule |
| C. | Five joules |
| D. | One joule second |
| Answer» C. Five joules | |
| 41. |
_ When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will$? |
| A. | Decrease |
| B. | Increase |
| C. | Remain constant |
| D. | None of the above |
| Answer» C. Remain constant | |
| 42. |
_ In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is$? |
| A. | 33 V |
| B. | 66 V |
| C. | 80 V |
| D. | 132 V |
| Answer» C. 80 V | |
| 43. |
_ Electric pressure is also called$? |
| A. | Resistance |
| B. | Power |
| C. | Voltage |
| D. | Energy |
| Answer» D. Energy | |
| 44. |
_ Which of the following statement is correct?$? |
| A. | A semiconductor is a material whose conductivity is same as between that of a conductor and an insulator |
| B. | A semiconductor is a material which has conductivity having average value of conductivity of metal and insulator |
| C. | A semiconductor is one which conducts only half of the applied voltage |
| D. | A semiconductor is a material made of alternate layers of conducting material and insulator |
| Answer» B. A semiconductor is a material which has conductivity having average value of conductivity of metal and insulator | |
| 45. |
_ A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is$? |
| A. | 400 Q |
| B. | 600 Q |
| C. | 800 Q |
| D. | 1000 Q |
| Answer» D. 1000 Q | |
| 46. |
_ Resistance of a tungsten lamp as applied voltage increases$? |
| A. | Decreases |
| B. | Increases |
| C. | Remains same |
| D. | None of the above |
| Answer» C. Remains same | |
| 47. |
_ Conductance: mho ::$? |
| A. | Resistance : ohm |
| B. | Capacitance : Henry |
| C. | Inductance : farad |
| D. | lumen : steradian |
| Answer» B. Capacitance : Henry | |
| 48. |
_ Heat in a conductor is produced on the passage of electric current due to$? |
| A. | reactance |
| B. | capacitance |
| C. | impedance |
| D. | resistance |
| Answer» E. | |
| 49. |
_ A thermistor has$? |
| A. | Positive temperature coefficient |
| B. | Negative temperature coefficient |
| C. | Zero temperature coefficient |
| D. | Variable temperature coefficient |
| Answer» D. Variable temperature coefficient | |
| 50. |
_ With rise in temperature the resistance of semiconductors$? |
| A. | Decreases |
| B. | Increases |
| C. | First increases and then decreases |
| D. | Remains constant |
| Answer» B. Increases | |