Related Questions

Which of the following is the non-linearity caused by servomotor ?
A Static friction
B Backlash
C Saturation
D None of the above
A.C. servomotor is basically a
A Universal motor
B Single phase induction motor
C Two phase induction motor
D Three phase induction motor
A.C. servomotor resembles
A Two phase induction motor
B Three phase induction motor
C Direct current series motor
D Universal motor
In a two phasor servomotor, the direction of rotation of the rotating field depends on
A Magnitudes of voltages applied to the two stator windings
B Phase relation of voltages applied to the two stator windings
C Both magnitude and phase relationship of voltages applied to the two stator windings
D None of the above
The permanent magnet field system of brushless dc servo- motor is generally on
A Stator
B Rotor
C Partly on stator and partly on rotor
D Either (a) or (b)
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
A permanent magnet
A attracts some substances and repels others
B attracts all paramagnetic substances and repels others
C attracts only ferromagnetic substances
D attracts ferromagnetic substances and repels all others
The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields
A meter is surrounded by strong magnetic fields
B a soft iron shielding is used
C a plastic shielding is provided
D a shielding of anon-magnetic material is used
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
If Sabbir requires 5 minutes to make a box and Zoha requires 7 minutes to make a box, what will be the number of boxes made by Sabbir to the number of boxes made by Zoha if they work for 5 hours and 50 minutes?
A 5 to 6
B 7 to 5
C 5 to 7
D 6 to 5

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