Top 150+ Solved Electromagnetic Interference MCQ Questions Answer
Q. For measuring a very high resistance we should use
a. kelvin\s double bridge
b. wheat stone bridge
c. meggar
d. none of the above
Q. The electrical power to a meggar is provided by
a. battery
b. permanent magnet d.c. generator
c. a generator
d. any of the above
Q. Which of the following devices should be used for accurate measurementof low D.C. voltage ?
a. small range moving coil voltmeter
b. d.c. potentiometer
c. small range thermocouple voltmeter
d. none of the above
Q. It is required to measure the true open circuit e.m.f. of a battery. The best device is
a. d.c. voltmeter
b. ammeter and a known resistance
c. d. potentiometer
d. none of the above
Q. 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
Q. If the current in a capacitor leads the voltage by 80°, the loss angle of thecapacitor is
a. 10°
b. 80°
c. 120°
d. 170°
Q. To avoid the effect of stray magnetic field in A.C. bridges we can use
a. magnetic screening
b. wagner earthing device
c. wave filters
d. any of the above
Q. Commonly used standard capacitor is
a. spherical type
b. concentric cylindrical type
c. electrostatic type
d. multilayer parallel plate type
Q. The most commonly used null deflector in a powerfrequency ac bridge is a
a. vibration galvanometer
b. d\arsanval galvanometer
c. ballistic galvanometer
d. tachometer
Q. Megger is an instrument used for the measurement of:
a. high resistance and insulation resistance
b. medium resistance
c. low resistance
d. leakage current
Q. Anderson bridge is used to measure of:
a. inductance
b. capacitance
c. time period
d. resistance and capacitance