Q1. Which instrument is used to measure electric current? A) Voltmeter B) Ammeter C) Ohmmeter D) Wattmeter
Q2. An ammeter is connected in: A) Parallel B) Series C) Mixed D) None
Q3. A voltmeter is connected in: A) Series B) Parallel C) Mixed D) None
Q4. The SI unit of current is: A) Volt B) Ohm C) Ampere D) Watt
Q5. The SI unit of voltage is: A) Ampere B) Volt C) Ohm D) Coulomb
Q6. An ideal ammeter has: A) Infinite resistance B) High resistance C) Zero resistance D) Variable resistance
Q7. An ideal voltmeter has: A) Zero resistance B) Infinite resistance C) Low resistance D) Medium resistance
Q8. Which instrument measures electrical power? A) Galvanometer B) Wattmeter C) Ammeter D) Voltmeter
Q9. The instrument used to detect small currents is: A) Wattmeter B) Galvanometer C) Energy meter D) Voltmeter
Q10. A galvanometer can be converted into an ammeter by connecting: A) High resistance in series B) Low resistance in parallel C) Capacitor in series D) Inductor in parallel
Q11. The low resistance connected parallel to a galvanometer is called: A) Multiplier B) Shunt C) Rheostat D) Fuse
Q12. A galvanometer is converted into a voltmeter by adding: A) Shunt resistance B) Low resistance C) High resistance in series D) Capacitor
Q13. The high resistance connected in series with a galvanometer is called: A) Multiplier B) Shunt C) Fuse D) Relay
Q14. Which instrument measures resistance directly? A) Voltmeter B) Ammeter C) Ohmmeter D) Wattmeter
Q15. A multimeter can measure: A) Current only B) Voltage only C) Resistance only D) Current, voltage, and resistance
Q16. The commercial unit of electrical energy is: A) Joule B) Watt C) kWh D) Coulomb
Q17. Electrical energy consumed in homes is measured by: A) Wattmeter B) Ammeter C) Energy meter D) Galvanometer
Q18. The unit measured by an energy meter is: A) kWh B) Watt C) Volt D) Ampere
Q19. Which instrument measures potential difference? A) Ammeter B) Voltmeter C) Galvanometer D) Wattmeter
Q20. The moving coil galvanometer works on: A) Heating effect B) Magnetic effect of current C) Chemical effect D) Photoelectric effect
Q21. The scale of a moving coil galvanometer is: A) Non-uniform B) Logarithmic C) Uniform D) Circular
Q22. Which instrument is most sensitive? A) Ammeter B) Voltmeter C) Galvanometer D) Wattmeter
Q23. The resistance of an ammeter should be: A) Very high B) Infinite C) Very low D) Medium
Q24. The resistance of a voltmeter should be: A) Zero B) Low C) Very high D) Variable
Q25. Which device measures electric charge? A) Electroscope B) Ammeter C) Wattmeter D) Ohmmeter
Q26. The function of an electroscope is to: A) Measure voltage B) Detect electric charge C) Measure power D) Measure resistance
Q27. Which instrument measures insulation resistance? A) Megger B) Ammeter C) Wattmeter D) Voltmeter
Q28. A Megger is used mainly for: A) Low resistance B) Current measurement C) High resistance measurement D) Power measurement
Q29. The instrument used for comparing EMFs is: A) Potentiometer B) Voltmeter C) Ammeter D) Wattmeter
Q30. A potentiometer works on the principle that: A) Current is constant B) Potential drop is proportional to length C) Resistance is constant D) Voltage is constant
Q31. Which instrument measures frequency? A) Frequency meter B) Ammeter C) Wattmeter D) Voltmeter
Q32. The unit of frequency is: A) Volt B) Hertz C) Ohm D) Tesla
Q33. Which instrument measures capacitance? A) Capacitance meter B) Ammeter C) Voltmeter D) Galvanometer
Q34. Which instrument measures inductance? A) LCR meter B) Ammeter C) Wattmeter D) Voltmeter
Q35. The full form of LCR is: A) Length-Capacitance-Resistance B) Inductance-Capacitance-Resistance C) Load-Current-Resistance D) Linear-Capacitor-Relay
Q36. The sensitivity of a galvanometer increases when: A) Turns increase B) Magnetic field decreases C) Resistance decreases D) Area decreases
Q37. The torque in a moving coil galvanometer is produced by: A) Electric field B) Magnetic field C) Gravity D) Friction
Q38. The controlling torque in a galvanometer is provided by: A) Springs B) Magnets C) Coil D) Core
Q39. Eddy currents are minimized by: A) Thick metal sheets B) Laminated core C) Copper rod D) Plastic rod
Q40. Which instrument is based on electromagnetic induction? A) Energy meter B) Thermometer C) Hygrometer D) Barometer
Q41. The pointer in analog instruments indicates: A) Reading B) Resistance C) Current source D) Voltage source
Q42. Digital meters display values in: A) Pointer form B) Numerical form C) Graph form D) Circular form
Q43. Which is more accurate? A) Analog meter B) Digital meter C) Compass D) Electroscope
Q44. Parallax error occurs in: A) Digital meters B) Analog meters C) Both equally D) None
Q45. Which instrument uses a mirror scale to reduce parallax? A) Analog meter B) Digital meter C) Thermometer D) Stopwatch
Q46. The range of an ammeter is increased by: A) Multiplier B) Shunt C) Capacitor D) Transformer
Q47. The range of a voltmeter is increased by: A) Shunt B) Multiplier C) Capacitor D) Fuse
Q48. Ohmmeter measures: A) Current B) Voltage C) Resistance D) Power
Q49. A clamp meter measures: A) Current without breaking the circuit B) Voltage only C) Resistance only D) Charge
Q50. Which meter is used in households? A) Energy meter B) Galvanometer C) Potentiometer D) Megger
Q51. Wattmeter measures: A) Energy B) Voltage C) Current D) Power
Q52. The SI unit of power is: A) Joule B) Watt C) Volt D) Ohm
Q53. The instrument for measuring earth resistance is: A) Earth tester B) Ammeter C) Voltmeter D) Wattmeter
Q54. Which meter combines ammeter, voltmeter, and ohmmeter? A) Potentiometer B) Multimeter C) Megger D) Wattmeter
Q55. A digital multimeter is commonly abbreviated as: A) DMM B) DCM C) DVM D) DWM
Q56. The scale of a moving iron instrument is: A) Uniform B) Non-uniform C) Linear D) Equal
Q57. Moving iron instruments can measure: A) DC only B) AC only C) Both AC and DC D) None
Q58. PMMC stands for: A) Permanent Magnet Moving Coil B) Permanent Meter Moving Core C) Power Magnetic Measuring Coil D) Potential Measuring Coil
Q59. PMMC instruments measure: A) AC only B) DC only C) Both AC and DC D) Frequency only
Q60. The damping torque in PMMC instruments is provided by: A) Air friction B) Eddy currents C) Springs D) Gravity
Q61. Which instrument is most commonly used for laboratory current measurement? A) Ammeter B) Thermometer C) Hygrometer D) Calorimeter
Q62. Instrument accuracy refers to: A) Speed B) Closeness to true value C) Size D) Weight
Q63. Instrument precision refers to: A) Reproducibility B) Cost C) Speed D) Weight
Q64. The maximum value measurable by an instrument is called: A) Sensitivity B) Range C) Precision D) Error
Q65. Calibration means: A) Cleaning instrument B) Checking accuracy with standards C) Painting instrument D) Repairing instrument
Q66. Instrument error can be reduced by: A) Calibration B) Heating C) Cooling D) Lubrication
Q67. Which instrument is used in AC energy measurement? A) Induction type energy meter B) Galvanometer C) Potentiometer D) Electroscope
Q68. One kilowatt-hour equals: A) 3.6 × 10⁶ J B) 3600 J C) 1000 J D) 36 J
Q69. Deflection in a galvanometer depends upon: A) Current B) Voltage only C) Resistance only D) Power only
Q70. Which instrument measures small potential differences accurately? A) Potentiometer B) Ammeter C) Wattmeter D) Energy meter
Q71. The heart of an analog ammeter is: A) Capacitor B) Galvanometer C) Battery D) Fuse
Q72. The heart of an analog voltmeter is: A) Galvanometer B) Capacitor C) Battery D) Relay
Q73. Which instrument can test continuity? A) Multimeter B) Wattmeter C) Electroscope D) Potentiometer
Q74. A fuse protects against: A) Low voltage B) Overcurrent C) Low current D) Frequency change
Q75. Instrument sensitivity is highest when: A) Small current gives large deflection B) Large current gives small deflection C) No deflection occurs D) Resistance is zero
Q76. Digital voltmeters use: A) Digital display B) Pointer C) Scale and mirror D) Needle only
Q77. Which instrument measures reactive power? A) VAR meter B) Ammeter C) Voltmeter D) Ohmmeter
Q78. The unit of reactive power is: A) Watt B) VAR C) Joule D) Volt
Q79. Which meter measures power factor? A) Power factor meter B) Wattmeter C) Ammeter D) Ohmmeter
Q80. Power factor ranges between: A) 0 and 1 B) 1 and 2 C) 0 and 100 D) -1 and 2
Q81. The instrument used to measure phase angle is: A) Phase meter B) Ammeter C) Voltmeter D) Megger
Q82. Instrument drift refers to: A) Sudden error B) Gradual change in readings C) Zero reading D) Infinite reading
Q83. Which instrument uses Hall effect for current measurement? A) Clamp meter B) Potentiometer C) Wattmeter D) Megger
Q84. Which meter measures both AC and DC voltage? A) Multimeter B) Electroscope C) Energy meter D) Potentiometer
Q85. The SI unit of resistance is: A) Volt B) Ampere C) Ohm D) Watt
Q86. Which instrument is used to measure low resistance accurately? A) Wheatstone bridge B) Thermometer C) Barometer D) Calorimeter
Q87. The Wheatstone bridge works on: A) Balanced network principle B) Electromagnetic induction C) Heating effect D) Chemical effect
Q88. Null deflection is associated with: A) Potentiometer B) Thermometer C) Ammeter D) Wattmeter
Q89. A null method gives: A) Less accuracy B) High accuracy C) No accuracy D) Variable accuracy
Q90. Which instrument measures alternating current directly? A) Moving iron ammeter B) PMMC ammeter C) Galvanometer D) Potentiometer
Q91. Which instrument has the least loading effect? A) Ideal voltmeter B) Real voltmeter C) Ammeter D) Wattmeter
Q92. Loading effect is minimized by: A) High voltmeter resistance B) Low voltmeter resistance C) High ammeter resistance D) Low battery voltage
Q93. Which instrument is used for laboratory standard voltage comparison? A) Potentiometer B) Ammeter C) Wattmeter D) Megger
Q94. The function of a shunt is to: A) Increase voltage range B) Bypass excess current C) Increase resistance D) Store charge
Q95. The function of a multiplier is to: A) Increase current range B) Increase voltage range C) Decrease voltage D) Store energy
Q96. Which instrument records energy consumption over time? A) Energy meter B) Ammeter C) Voltmeter D) Galvanometer
Q97. The SI unit of electric charge is: A) Coulomb B) Volt C) Ohm D) Watt
Q98. Which instrument is best for detecting tiny currents? A) Galvanometer B) Wattmeter C) Energy meter D) Megger
Q99. Analog measuring instruments generally use: A) Pointer and scale B) LCD display C) LED display D) Digital code
Q100. The primary purpose of electrical measuring instruments is: A) Generate electricity B) Store electricity C) Measure electrical quantities D) Reduce electricity
Answer Key
1-B, 2-B, 3-B, 4-C, 5-B, 6-C, 7-B, 8-B, 9-B, 10-B
11-B, 12-C, 13-A, 14-C, 15-D, 16-C, 17-C, 18-A, 19-B, 20-B
21-C, 22-C, 23-C, 24-C, 25-A, 26-B, 27-A, 28-C, 29-A, 30-B
31-A, 32-B, 33-A, 34-A, 35-B, 36-A, 37-B, 38-A, 39-B, 40-A
41-A, 42-B, 43-B, 44-B, 45-A, 46-B, 47-B, 48-C, 49-A, 50-A
51-D, 52-B, 53-A, 54-B, 55-A, 56-B, 57-C, 58-A, 59-B, 60-B
61-A, 62-B, 63-A, 64-B, 65-B, 66-A, 67-A, 68-A, 69-A, 70-A
71-B, 72-A, 73-A, 74-B, 75-A, 76-A, 77-A, 78-B, 79-A, 80-A
81-A, 82-B, 83-A, 84-A, 85-C, 86-A, 87-A, 88-A, 89-B, 90-A
91-A, 92-A, 93-A, 94-B, 95-B, 96-A, 97-A, 98-A, 99-A, 100-C