Related Questions

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)
Which dc servomotor requires strongest permanent magnet?
A Slotted armature
B Surface wound armature
C Surface wound with stationary 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
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 a bar magnet is __, the two pieces form two complete magnets, each with north and south pole.
A broken
B broke
C breaking
D break
Poles ; Magnet ::? : Battery
A Energy
B Power
C Terminals
D Cells
What is the gigantic magnet in space?
A Stars
B Blue hole
C Black hole
D all
Magnetism of a magnet can be destroyed by
A heating
B hammering
C by inductive action of another magnet
D by all above methods
The north pole of a magnet is the one:
A that has its molecules arranged in a random pattern
B that would be attracted to the earth's north magnetic pole
C that would be repelled by the south pole of another magnet
D that would be attracted to the earth's south magnetic pole
E None of the above

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