Electronics & Instrumentation MCQ Questions Answers – Electronics Engineering (ECE)
1) Loading effect is primarily caused by instruments having
a) high resistance
b) high sensitivity
c) low sensitivity
d) high range
2) The error of an instrument is normally given as a percentage of
A. measured value
B. full-scale value
C. mean value
D. rms value
3) A 1/3 digit voltmeter having a resolution of 100Mv can be used to measure maximum voltage of
a) 100 V
b) 200 V
c) 1000 V
d) 5000 V
4) A multi-ammeter can be used as
A. Voltmeter and ammeter
B. Wattmeter
C. Ohmmeter
D. Frequency meter
5) Load cell employ
a) piezoelectric crystal
b) capacitor
c) mutual inductance
d) strain gauges
6) The difference between the measured value and the true value is called
a) gross error
b) relative error
c) probable error
d) absolute error
7) Which meter is suitable for the measurement of 10mV at 50MHz?
A. Moving iron voltmeter
B. VTVM
C. Moving coil voltmeter
D. CRO
8) The device possessing the highest photosensitivity is a
a) photoconductive cell
b) photovoltaic cell
c) photodiode
d) phototransistor
9) Magnetic flux can be measured by
a) capacitive pick-up
b) inductive pick-up
c)b resistive pick-up
d) Hall-effect pick-up
10) Direct method is used to measure
A. Length
B. Temperature
C. Pressure
D. Voltage