#1
Which instrument is used to measure DC voltage?
Ammeter
Voltmeter
Ohmmeter
Wattmeter
#2
What is the SI unit of electrical resistance?
#3
What is the function of a transducer?
To convert electrical energy into mechanical energy
To convert mechanical energy into electrical energy
To convert analog signals into digital signals
To measure temperature
#4
What is the function of a galvanometer?
To measure voltage
To measure current
To detect and measure small electric currents
To measure resistance
#5
Which material is commonly used as a core in transformers?
#6
Which of the following is a passive transducer?
LVDT
Thermocouple
Strain gauge
Photovoltaic cell
#7
What is the primary function of an oscilloscope?
Measure resistance
Display voltage vs. time graph
Measure current
Display power vs. time graph
#8
What is the principle behind the operation of a thermocouple?
Piezoelectric effect
Photoelectric effect
Seebeck effect
Hall effect
#9
Which of the following instruments is used to measure high-frequency AC signals?
Multimeter
Digital oscilloscope
Megger
Function generator
#10
Which of the following is used to measure the power factor of a circuit?
Wattmeter
Ammeter
Voltmeter
Power factor meter
#11
What is the purpose of a shunt resistor in an ammeter?
To increase sensitivity
To decrease sensitivity
To measure voltage
To measure current
#12
In a Wheatstone bridge, what happens when the ratio of the resistances in the two arms are equal?
The bridge becomes unbalanced
The bridge becomes balanced
The voltage across the bridge becomes zero
The bridge becomes sensitive to noise
#13
What is the function of a strain gauge?
To measure temperature
To measure pressure
To measure displacement
To measure humidity
#14
What is the function of a photovoltaic cell?
To measure light intensity
To convert light energy into electrical energy
To measure temperature
To measure pressure
#15
What is the purpose of a piezoelectric sensor?
To measure temperature
To measure pressure
To measure speed
To measure humidity