MCQOPTIONS
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MCQOPTIONS
This section includes 31 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. |
A bridge circuit works at a frequency of 2 kHz. Which of the following can be used as detectors for detection of null conditions in the bridge? |
| A. | Vibration galvanometers and headphones |
| B. | Headphones and tunable amplifiers |
| C. | Vibration galvanometers and tunable amplifiers |
| D. | Vibration galvanometers, headphones and tunable amplifiers |
| Answer» C. Vibration galvanometers and tunable amplifiers | |
| 2. |
In figure, Za = 100 ∠50°, Zb = 300 ∠-90° and Zc = 200 ∠0°. For balanced condition, Zd will be - |
| A. | 600 ∠-40° |
| B. | 600 ∠140° |
| C. | 600 ∠-140° |
| D. | 150 ∠140° |
| Answer» D. 150 ∠140° | |
| 3. |
In De-Sauty bridge (unmodified form) balance is obtained when |
| A. | both the capacitors are prefect |
| B. | any one of the capacitor is perfect |
| C. | both the capacitors are imperfect |
| D. | None of the above |
| Answer» B. any one of the capacitor is perfect | |
| 4. |
Owen bridge is used to |
| A. | Determine dielectric loss and capacitance |
| B. | Measure high resistance |
| C. | Determined self-inductance |
| D. | Measure mutual inductance |
| Answer» D. Measure mutual inductance | |
| 5. |
A potentiometer R5 is put in the apex of the bridge shown in the figure to balance the circuit. If Ru = 500 Ω; Rv = 500 Ω; R2 = 515 Ω; R3 = 480 Ω; and R5 = 100 Ω, then find the values of R6 and R7 to balance the bridge and compensate for the unequal values of R2 and R3. |
| A. | R6 = 60 Ω and R7 = 40 Ω |
| B. | R6 = 50 Ω and R7 = 50 Ω |
| C. | R6 = 65.5 Ω and R7 = 34.5 Ω |
| D. | R6 = 67.5 Ω and R7 = 32.5 Ω |
| Answer» E. | |
| 6. |
Match List-I(Bridge) with List-II (Parameter to be measured) and select the correct answer:List-IList-IIAMaxwell’s bridge1FrequencyBHay’s bridge2Inductance medium Q-coils (1 < Q < 10)CSchering bridge3Inductance of high coils (Q > 10)DWein bridge4Capacitance |
| A. | A4B3C2D1 |
| B. | A4B1C2D3 |
| C. | A2B3C4D1 |
| D. | A2B1C4D3 |
| Answer» D. A2B1C4D3 | |
| 7. |
Assertion (A): De-Sauty’s bridge is suitable only for pure capacitorReason (R): Capacitors are mostly perfect |
| A. | Both A and R are true and R is correct explanation of A |
| B. | Both A and R are true but R is not correct explanation of A |
| C. | A is true and R is false |
| D. | A is false and R is true |
| Answer» C. A is true and R is false | |
| 8. |
Insulation resistance of a cable can be measured by which of the following?i. Meggarii. Galvanometer method |
| A. | Only ii |
| B. | Both i and ii |
| C. | Neither i nor ii |
| D. | Only i |
| Answer» C. Neither i nor ii | |
| 9. |
A 1-mA meter movement with an internal resistance of 100 Ω is to be converted into a 0-100 mA ammeter. The value of shunt resistance will be |
| A. | 2.41 Ω |
| B. | 2.01 Ω |
| C. | 1.41 Ω |
| D. | 1.01 Ω |
| Answer» E. | |
| 10. |
For measurement of mutual inductance, we can use |
| A. | Anderson bridge |
| B. | Maxwell’s bridge |
| C. | Heaviside bridge |
| D. | None of these |
| Answer» D. None of these | |
| 11. |
For measurement of high resistance, we use: |
| A. | Loss of Charge method |
| B. | Wheatstone bridge |
| C. | Potentiometer method |
| D. | Kelvin Bridge method |
| Answer» B. Wheatstone bridge | |
| 12. |
Direction: It consists of two statements, one labelled as Statement (I) and the other as Statement (II). Examine these two statements carefully and select the answers to these items using the codes given below:Statement (I): In the Kelvin double-bridge method, provision has been made to eliminate the errors due to contact and lead resistances.Statement (II): The Schering bridge is used for measuring small capacitance at low voltages with very high precision. |
| A. | Both statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both statement (I) and Statement (II) are individually true and Statement (II) is not the correct explanation of Statement (I) |
| C. | Statement (I) is true but Statement (II) is false |
| D. | Statement (I) is false but Statement (II) is true |
| Answer» C. Statement (I) is true but Statement (II) is false | |
| 13. |
Directions: It consists of two statements, one labelled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answers to these items using the codes given below:Statement (I):Bridge measurements are considered to be more accurate as compared to measurements done indicating instruments.Statement (II):In a bridge measurement, the accuracy of the components used in the different arms of the bridge alone comes into picture. |
| A. | Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) |
| B. | Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I) |
| C. | Statement (I) is true but Statement (II) is false |
| D. | Statement (I) is false but Statement (II) is true |
| Answer» B. Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I) | |
| 14. |
Insulation resistance is measured in: |
| A. | Milli ohm |
| B. | Ohm meter |
| C. | Micro ohm |
| D. | Mega ohm |
| Answer» E. | |
| 15. |
In the circuit shown here, find the value of Rx at which the ac bridge is balanced. |
| A. | 100 Ω |
| B. | 200 Ω |
| C. | 350 Ω |
| D. | 250 Ω |
| Answer» D. 250 Ω | |
| 16. |
Determine the quality factor for Maxwell’s inductance capacitance bridge given below when the bridge is supplied by a frequency of 50 Hz. |
| A. | 0.16 |
| B. | 0.27 |
| C. | 0.36 |
| D. | 0.47 |
| Answer» E. | |
| 17. |
A galvanometer has a current sensitivity of 1 μA/mm and critical damping resistance of 1 kΩ. The voltage sensitivity and the mega-ohm sensitivity respectively are |
| A. | 1 mV/mm and 1 MΩ |
| B. | 1 mV/mm and 2 MΩ |
| C. | 2 mV/mm and 2 MΩ |
| D. | 2 mV/mm and 1 MΩ |
| Answer» B. 1 mV/mm and 2 MΩ | |
| 18. |
Match the following Instruments given in column 1 with respective quantities they read in column 2.Column 1Column 21. De’sauty Bridgea. Capacitance2. Potentiometerb. Low Resistance3. Meggerc. High Resistance4. Wattmeterd. Power |
| A. | 1 - a, 2 - c, 3 - b, 4 - d |
| B. | 1 - d, 2 - c, 3 - b, 4 - a |
| C. | 1 - d, 2 - b, 3 - c, 4 - a |
| D. | 1 - a, 2 - b, 3 - c, 4 - d |
| Answer» E. | |
| 19. |
If an ideal inductor (L) is connected in one arm of the bridge circuit and resistances R1, R2 and R3 are connected in the other three arms, then which of the following statements is true? |
| A. | The bridge can be balanced |
| B. | The bridge is balanced for some specified value of R1, R2 and R3 |
| C. | The bridge is balanced for some specified value of frequency |
| D. | The bridge cannot be balanced |
| Answer» E. | |
| 20. |
A vibration galvanometer is |
| A. | Low - pass characteristic. |
| B. | High - pass characteristic |
| C. | Band - pass characteristic with very narrow passband. |
| D. | Band - stop characteristic with very narrow stopband. |
| Answer» D. Band - stop characteristic with very narrow stopband. | |
| 21. |
Inductance is measured by |
| A. | Kelvin bridge |
| B. | Wien bridge |
| C. | Schering bridge |
| D. | maxwell bridge |
| Answer» E. | |
| 22. |
For checking of insulation resistance, we need a: |
| A. | 6 A multi meter |
| B. | 12 V multi meter |
| C. | 500 V megger |
| D. | Any of these |
| Answer» D. Any of these | |
| 23. |
Loss of charge method is used for the measurement of: |
| A. | High inductance |
| B. | Low resistance |
| C. | Low inductance |
| D. | High resistance |
| Answer» E. | |
| 24. |
Hay’s bridge is used to measure inductances of coils having: |
| A. | A very low Q factor |
| B. | A low Q factor |
| C. | A medium Q factor |
| D. | A high Q factor |
| Answer» E. | |
| 25. |
Match List-I with List-II:List-I(Bridges)List-II(Applications)a)Hay Bridgei)Capacitanceb)Maxwell Bridgeii)Frequencyc)Schering Bridgeiii) High Q-coilsd)Wein Bridgeiv)Medium Q-coils |
| A. | a-iv; b-ii; c-iii; d-i |
| B. | a-iii; b-iv; c-ii; d-i |
| C. | a-iv; b-ii; c-i; d-iii |
| D. | a-iii; b-iv; c-i; d-ii |
| Answer» E. | |
| 26. |
Calculate the value of quality factor in the Hay’s Bridge given below when supplied by a frequency of 50 Hz? |
| A. | 31.83 |
| B. | 15.91 |
| C. | 10.61 |
| D. | 6.36 |
| Answer» B. 15.91 | |
| 27. |
In wire wound strain gauges, the change in resistance under strained condition is mainly on account of _____. |
| A. | Change in diameter of the wire |
| B. | Change in length of the wire |
| C. | change in both length and diameter of wire |
| D. | Change in resistivity |
| Answer» D. Change in resistivity | |
| 28. |
In an Anderson bridge, the unknown inductance is measured in terms of |
| A. | Known inductance and resistance |
| B. | Known capacitance and resistance |
| C. | Known resistance |
| D. | Known inductance |
| Answer» C. Known resistance | |
| 29. |
AC bridges cannot be used for the direct measurement of |
| A. | Inductance |
| B. | Capacitance storage factor |
| C. | Loss factor |
| D. | Capacitance |
| Answer» E. | |
| 30. |
Match List I (Bridges) with List – II (Quantity measured) and select the correct answer using the codes given below the lists:List IA. Anderson BridgeB. Kelvin Double BridgeC. Schering BridgeD. Wien BridgeList II1. Frequency2. Resistance3. Inductance4. CapacitanceCodes: A B C D |
| A. | 3 2 1 4 |
| B. | 3 2 4 1 |
| C. | 2 1 3 4 |
| D. | 2 3 4 1 |
| Answer» C. 2 1 3 4 | |
| 31. |
Measurement of capacitance is not possible by: |
| A. | RLC bridge |
| B. | Wien's bridge |
| C. | Schering Bridge |
| D. | Maxwell-Wein Bridge |
| Answer» E. | |