A. spring
B. gravity
C. eddy currents
D. all of the above
Related Mcqs:
- In a meggar controlling torque is provided by______________?
A. spring
B. gravity
C. coil
D. eddy current - In an energy meter braking torque is produced to________________?
A. safe guard it against creep
B. brake the instrument
C. bring energy meter to stand still
D. maintain steady speed and equal to driving torque - Which of the following essential features is possessed by an indicating instrument?
A. Deflecting device
B. Controlling device
C. Damping device
D. All of the above - A moving-coil permanent-magnet instrument can be used as ____________by using a low resistance shunt?
A. ammeter
B. voltmeter
C. flux-meter
D. ballistic galvanometer - A moving-coil permanent-magnet instrument can be used as flux-meter_____________?
A. by using a low resistance shunt
B. by using a high series resistance
C. by eliminating the control springs
D. by making control springs of large moment of inertia - The pointer of an indicating instrument should be______________?
A. very light
B. very heavy
C. either A. or B.
D. neither A. nor B. - The gravity controlled instrument has crowded scale because current is proportional to________________?
A. balancing weight
B. deflection angle
C. sine of deflection angle - If an instrument has cramped scale for larger values, then it follows________________?
A. square law
B. logarithmic law
C. uniform law
D. none of the above - An instrument transformer is used to extend the range of______________?
A. induction instrument
B. electrostatic instrument
C. moving coil instrument
D. any of the above - The ratio of maximum displacement deviation to full scale deviation of the instrument is called_______________?
A. static sensitivity
B. dynamic deviation
C. linearity
D. precision or accuracy
