11is the answer B [6]
for protcting a sensitiev equipmnt frm xetrnal mag field
it shud b
a)placed in aluminum can
b)placed in iron can
c)wrappd in insulation wen passing cuurnt thru it
d) surundd by fine copper shheet
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7 Answers
1wah ji......................meien aapko answer bataya tha na.............reason bata aab ...............
1may be here the principle employed is same as one in galvanization.
when placed in iron can,iron would try to gain to gain maximum influence in order to magnetize itself.so,it will not allow the magnetic field to interact with the sensitive equipment inside it.
1when placed in iron(FERROMAGNETIC) can,iron would try to gain to gain maximum influence in order to magnetize itself.so,it will not allow the magnetic field to interact with the sensitive equipment inside it.
DON U THINK IT IS CORRECT
11DC magnetizes employ large coils through which a current is applied for a short duration by closing a switch. The current flowing through the coil produces a magnetic field, which is usually directed by the use of iron cores and pole pieces, and magnets are placed in the gap between the pole pieces. DC magnetizes are only practical for magnetizing Alnico materials, which have a low magnetizing force requirement, or small sections of Ceramic materials.
