MCQOPTIONS
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MCQOPTIONS
This section includes 124 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. |
Most commonly used indicator electrode is |
| A. | Calomel electrode |
| B. | Silver electrode |
| C. | Silver – Silver chloride electrode |
| D. | Glass electrode |
| Answer» E. | |
| 2. |
Fiber optic sensor can be used to sense ____________. |
| A. | Displacement |
| B. | Power |
| C. | Current |
| D. | Resistance |
| Answer» B. Power | |
| 3. |
The resistance of LDR ____________ when exposed to radiant energy. |
| A. | Remains unaltered |
| B. | Increases |
| C. | Reaches maximum |
| D. | Decreases |
| Answer» E. | |
| 4. |
The slewing speed of X-Y recorder is |
| A. | 1.6 m/s |
| B. | 1.3 m/s |
| C. | 1.4 m/s |
| D. | 1.5 m/s |
| Answer» E. | |
| 5. |
A voltmeter is connected in a ___________ with the circuit component across which potential difference is to be measured. |
| A. | Parallel |
| B. | Series |
| C. | Series or parallel |
| D. | None of the above |
| Answer» B. Series | |
| 6. |
The sensitivity factor of strain gauge is normally of the order of |
| A. | 1 to 1.5 |
| B. | 1.5 to 2.0 |
| C. | 0.5 to 1.0 |
| D. | 5 to 10 |
| Answer» C. 0.5 to 1.0 | |
| 7. |
A chopper amplifier |
| A. | Converts AC signal from low frequency to high frequency |
| B. | Converts DC signal from low frequency to high frequency |
| C. | Converts AC signal from low frequency to DC high frequency |
| D. | Converts DC signal from low frequency to high frequency |
| Answer» C. Converts AC signal from low frequency to DC high frequency | |
| 8. |
Piezo – electric transducers work when we apply _____________ to it. |
| A. | Mechanical force |
| B. | Vibrations |
| C. | Illuminations |
| D. | Heat |
| Answer» E. | |
| 9. |
LVDT is an/a ___________ transducer. |
| A. | Magneto-strict ion |
| B. | Inductive |
| C. | Resistive |
| D. | Eddy current |
| Answer» E. | |
| 10. |
An ideal ammeter has ___________ resistance. |
| A. | Low |
| B. | Infinite |
| C. | Zero |
| D. | High |
| Answer» D. High | |
| 11. |
Which of the following are piezo electric substances?1. Barium titanate2. Lead titanate3. Lead Zirconate4. Cadmium and sulphate |
| A. | 1, 2 and 4 |
| B. | 1, 3 and 4 |
| C. | 1, 2 and 3 |
| D. | 2, 3 and 4 |
| Answer» D. 2, 3 and 4 | |
| 12. |
The improper response time of the amplifier in the biomedical recorders |
| A. | Affects the gain of the amplifier |
| B. | Delays the signals |
| C. | Changes the shape of the waveform of the signal |
| D. | Attenuates the signals |
| Answer» D. Attenuates the signals | |
| 13. |
The negative feed back in an amplifier |
| A. | Reduces voltage gain |
| B. | Increases the voltage gain |
| C. | Increases the gain band width product |
| D. | Reduces the input impedances |
| Answer» B. Increases the voltage gain | |
| 14. |
The amplifier gain varies with frequency. This happens mainly due to |
| A. | Miller effect |
| B. | Presence of external and internal capacitance |
| C. | Logarithmic increase in its output |
| D. | Inter stage transformer |
| Answer» C. Logarithmic increase in its output | |
| 15. |
The change in resistance of a metal wire owing to strain is due toS1: Change in dimension of wire expressed by factor (1-2µ)S2: Change in resistance ? |
| A. | S1 is true & S2 is false |
| B. | S2 is true & S1 is false |
| C. | Both S1 & S2 are true |
| D. | Both S1 & S2 are false |
| Answer» C. Both S1 & S2 are true | |
| 16. |
A voltmeter should have ___________ resistance. |
| A. | Zero |
| B. | Very high |
| C. | Very low |
| D. | None of the above |
| Answer» C. Very low | |
| 17. |
An ammeter should have ___________ resistance. |
| A. | Infinite |
| B. | Very large |
| C. | Very low |
| D. | None of the above |
| Answer» D. None of the above | |
| 18. |
The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ___________ transducer. |
| A. | Active |
| B. | Analog |
| C. | Digital |
| D. | Pulse |
| Answer» D. Pulse | |
| 19. |
Self generating type transducers are ___________ transducers. |
| A. | Active |
| B. | Passive |
| C. | Secondary |
| D. | Inverse |
| Answer» B. Passive | |
| 20. |
Capacitive transducers are normally employed for___________ measurements. |
| A. | Static |
| B. | Dynamic |
| C. | Transient |
| D. | Both static and dynamic |
| Answer» C. Transient | |
| 21. |
The outstanding characteristics of a D.C. amplifier is its |
| A. | Ability to amplify Dc and low frequency signals |
| B. | Temperature stability |
| C. | Utmost economy |
| D. | Avoidance of frequency sensitive components |
| Answer» B. Temperature stability | |
| 22. |
The horizontal plates of a CRO are supplied with ___________ to observe the waveform of signal. |
| A. | Sinusoidal wave |
| B. | Cosine wave |
| C. | Sawtooth wave |
| D. | None of the above |
| Answer» D. None of the above | |
| 23. |
In PMMC writing system, the magnitude of pen deflection is proportional toS1: Current flowing through the coilS2: Voltage in the coil |
| A. | S1 is true & S2 is false |
| B. | S2 is true & S1 is false |
| C. | Both S1 & S2 are true |
| D. | Both S1 & S2 are false |
| Answer» B. S2 is true & S1 is false | |
| 24. |
The CMRR of a typical IC OPAMP is |
| A. | 70 dB |
| B. | 80 dB |
| C. | 85 dB |
| D. | 75 dB |
| Answer» C. 85 dB | |
| 25. |
In a graded index fiber, the total reflected light takes a ___________. |
| A. | Straight line path |
| B. | Parabolic path |
| C. | Elliptical path |
| D. | Circular path |
| Answer» C. Elliptical path | |
| 26. |
_____________ is the example of photo emissive cell |
| A. | LDR |
| B. | Photo diode |
| C. | Photo transistor |
| D. | Photo multiplier |
| Answer» B. Photo diode | |
| 27. |
The principle of operation of LVDT is based on the variation of |
| A. | Self inductance |
| B. | Mutual inductance |
| C. | Reluctance |
| D. | Permanence |
| Answer» C. Reluctance | |
| 28. |
Storage oscilloscope operates on the principle of |
| A. | Primary emission |
| B. | Deflection |
| C. | Secondary emission |
| D. | Diffusion |
| Answer» D. Diffusion | |
| 29. |
Isolation amplifier actually operates on the principle of |
| A. | Filtering |
| B. | Attenuation |
| C. | Clipping |
| D. | Amplification |
| Answer» C. Clipping | |
| 30. |
If the negative potential on the control grid of CRT is increased, the intensity of spot ___________. |
| A. | Is increased |
| B. | Is decreased |
| C. | Remains the same |
| D. | None of the above |
| Answer» C. Remains the same | |
| 31. |
In foil strain gauge the thickness of foil varies from |
| A. | 2.5 micron to 6 micron |
| B. | 25 micron (or) less |
| C. | 25 micron to 60 micron |
| D. | 2.5 micron to 5 micron |
| Answer» B. 25 micron (or) less | |
| 32. |
A CRO is used to measure ___________. |
| A. | Voltage |
| B. | Frequency |
| C. | Phase |
| D. | All of above |
| Answer» E. | |
| 33. |
A VTVM is never used to measure ___________. |
| A. | Voltage |
| B. | Current |
| C. | Resistance |
| D. | None of the above |
| Answer» C. Resistance | |
| 34. |
Which of the following is likely to have the largest resistance? |
| A. | Voltmeter of range 10 V |
| B. | Moving coil galvanometer |
| C. | Ammeter of range 1 A |
| D. | A copper wire of length 1 m and diameter 3 mm |
| Answer» B. Moving coil galvanometer | |
| 35. |
If the full-scale deflection current of a multimeter is 50 µA, its sensitivity is |
| A. | 10 kΩ/V |
| B. | 100 kΩ/V |
| C. | 50 kΩ/V |
| D. | 20 kΩ/V |
| Answer» E. | |
| 36. |
Resistively generated inference arises through incorrect __________________. |
| A. | Grounding |
| B. | Current density at the electrodes |
| C. | Supply voltage |
| D. | Input impedance |
| Answer» B. Current density at the electrodes | |
| 37. |
The principle of operation of variable resistance transducer is |
| A. | Deformation leads to change in resistance |
| B. | Displacement of a contact slider on a resistance |
| C. | Coupling of two coils changes with displacement |
| D. | Movement of magnetic field produces variation in resistance of material |
| Answer» C. Coupling of two coils changes with displacement | |
| 38. |
S1: Transducer is a device which converts physical into electrical quantityS2: Transducer is also called as sensor. |
| A. | S1 is true & S2 is false |
| B. | S2 is true & S1 is false |
| C. | Both S1 & S2 are true |
| D. | Both S1 & S2 are false |
| Answer» C. Both S1 & S2 are true | |
| 39. |
If the current gain of the amplifier is X, its voltage gain is Y, then its power gain will be |
| A. | X/Y |
| B. | X*Y |
| C. | X+Y |
| D. | X-Y |
| Answer» C. X+Y | |
| 40. |
CMRR is more in __________ |
| A. | Single ended amplifier |
| B. | Differential amplifier |
| C. | Inverting operational amplifier |
| D. | Chopper amplifier |
| Answer» C. Inverting operational amplifier | |
| 41. |
Which of the following can be measured with the help of piezo electric crystal? |
| A. | Force |
| B. | Velocity |
| C. | Sound |
| D. | Pressure |
| Answer» B. Velocity | |
| 42. |
Strain gauge, LVDT and thermocouple are examples of |
| A. | Active transducers |
| B. | Passive transducers |
| C. | Analog transducers |
| D. | Primary transducers |
| Answer» D. Primary transducers | |
| 43. |
To send 10% of the main current through a moving coil galvanometer of resistance 99 Ω the shunt required is ___________. |
| A. | 11 Ω |
| B. | 9 Ω |
| C. | 100 Ω |
| D. | 9 Ω |
| Answer» B. 9 Ω | |
| 44. |
If 2% of the main current is to be passed through a galvanometer of resistance G, then resistance of the shunt required is ___________. |
| A. | G/50 |
| B. | G/49 |
| C. | 49 G |
| D. | 50 G |
| Answer» C. 49 G | |
| 45. |
Photo conductive cell consists of a thin film of |
| A. | Quartz |
| B. | Lithium sulphate |
| C. | Barium titanate |
| D. | Selenium |
| Answer» E. | |
| 46. |
Piezo-electric transducers are |
| A. | Passive transducers |
| B. | Inverse transducers |
| C. | Digital transducers |
| D. | Pulse transducers |
| Answer» C. Digital transducers | |
| 47. |
A VTVM has ___________ input resistance than that of a multimeter |
| A. | More |
| B. | Less |
| C. | Same |
| D. | None of the above |
| Answer» B. Less | |
| 48. |
If a multimeter has a sensitivity of 1000 Ω per volt and reads 50 V full scale, its internal resistance is ___________ |
| A. | 20 kΩ |
| B. | 50 kΩ |
| C. | 10 kΩ |
| D. | None of the above |
| Answer» C. 10 kΩ | |
| 49. |
An ammeter is connected in ___________ with the circuit element whose current we wish to measure |
| A. | Series |
| B. | Parallel |
| C. | Series or parallel |
| D. | None of the above |
| Answer» B. Parallel | |
| 50. |
The use of storage oscilloscopeS1: Viewing rapidly changing non repetitive wave formsS2: Recording average values |
| A. | S1 is true & S2 is false |
| B. | S2 is true & S1 is false |
| C. | Both S1 & S2 are true |
| D. | Both S1 & S2 are false |
| Answer» C. Both S1 & S2 are true | |