Computer Programming MCQs

5739 MCQs  (Page 190 of 574)

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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
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Which of the following is the unit of magnetic flux density ?
A. Weber
B. Lumens
C. Tesla
D. None of the above
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Reciprocal of permeability is____________?
A. Reluctivity
B. Susceptibility
C. Permittivity
D. Conductance
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Ferrites are a sub-group of_______________?
A. Non-magnetic materials
B. Ferro-magnetic materials
C. Paramagnetic materials
D. Ferri-magnetic materials
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In the left hand rule, forefinger always represents______________?
A. Voltage
B. Current
C. Magnetic field
D. Direction of force on the conductor
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Substances which have permeability less than the permeability of free space are known as_____________?
A. Ferromagnetic
B. Paramagnetic
C. Diamagnetic
D. Bipolar
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Gilbert is a unit of_______________?
A. Electromotive force
B. Magnetomotive force
C. Conductance
D. Permittivity
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Paramagnetic materials have relative permeability________________?
A. Slightly less than unity
B. Equal to unity
C. Slightly more than unity
D. Equal to that ferromagnetic mate rials
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The main constituent of permalloy is_____________?
A. Cobalt
B. Chromium
C. Nickel
D. Tungsten
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Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of_________________?
A. 2 x 1(t2 n/m)
B. 2 x kt3 n/m
C. 2 x 10″5 n/m
D. 2x 1(t7 n/m)
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Word of the Day
22 Jul
Combative
ready or eager to fight or argue.
لڑاکا، متنازع، جھگڑالو

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