Induction
Interaction
Alignment
All of the above
Answer is Right!
Answer is Wrong!
Electrical machine design
42. Damping of the Ballistic galvanometer is made small to
get first deflection large
make the system oscillatory
make the system critically damped
get minimum overshoot
Answer is Right!
Answer is Wrong!
Detailed SolutionDamping of the Ballistic galvanometer is made small to
43. The design of electromagnets is based upon which of the following fundamental equations ?
Force equation
Magnetic circuit equation
Heating equation
Voltage equation E. All of the above
Answer is Right!
Answer is Wrong!
44. The adjustment of position of shading bands, in an energy meter is done to provide
friction compensation
creep compensation
braking torque
none of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionThe adjustment of position of shading bands, in an energy meter is done to provide
45. In order to achieve high accuracy, the slide wire of a potentiometer should be
as long as possible
as short as possible
neither too small not too large
very thick
Answer is Right!
Answer is Wrong!
Detailed SolutionIn order to achieve high accuracy, the slide wire of a potentiometer should be
46. ________ has a lowrelative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable.
Cast steel
Aluminium
Soft steel
Cast iron
Answer is Right!
Answer is Wrong!
47. Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to
improve its ventilation
eliminate creeping at no load
increase its deflecting torque
increase its braking torque
Answer is Right!
Answer is Wrong!
48. Various adjustments in an energy meter include
light load or friction
lag and creep
overload and voltage compensation
temperature compensation E. all of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionVarious adjustments in an energy meter include
49. In an energy meter braking torque is produced to
safe guard it against creep
brake the instrument
bring energy meter to stand still
maintain steady speed and equal to driving torque
Answer is Right!
Answer is Wrong!
Detailed SolutionIn an energy meter braking torque is produced to
50. The thermal conductivity of hydrogen is ______ times that of air
2
3
5
7
Answer is Right!
Answer is Wrong!
Detailed SolutionThe thermal conductivity of hydrogen is ______ times that of air