Related Questions

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
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 rectangular swimming pool is 15 meter long and 30 meter wide. A deck, with uniform width, surrounds the pool. If the total area of the pool and deck is 1050 square meter what is the width of the deck in meter?
A 6
B 7.5
C 10
D 5
A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be
A M
B $$\frac{{\text{M}}}{2}$$
C 2 M
D $$\frac{{\text{M}}}{4}$$
The stray line of magnetic flux is defined as
A a line vertical to the flux lines
B the mean length of a ring shaped coil
C a line of magnetic flux in a non-uniform field
D a line of magnetic flux which does not follow the designed path
Two men and women are entrusted with a task. The second man needs three hours more to cope up with the job than the second man and the woman would need working together. The first man, working alone, would need as much time as second man and the woman working together. The first man working alone, would spend eight hours less than the double period of the time second man would spend working alone. How much time would the two men and the women need to complete the task if they all asked together?
A 1 hour
B 2 hours
C 3 hours
D 4 hours
E 5 hours
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 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
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

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