Which of the following is expected to have the maximum permeability ?
Which of the following is expected to have the maximum permeability ?
A. Brass
B. Copper
C. Zinc
D. Ebonite
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In a simple magnetic field the strength of magnet flux_______________?
In a simple magnetic field the strength of magnet flux_______________?A. is constant and has same value in energy part of the magnetic field
B. increases continuously from initial value to final value
C. decreases continuously from initial value to final value
D. first increases and then decreases till it becomes zerohe retentivity (a property) of material is useful for the construction of__________?
he retentivity (a property) of material is useful for the construction of__________?A. permanent magnets
B. transformers
C. non-magnetic substances
D. electromagnetsWhen two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle?
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle?A. will be zero
B. will be infinite
C. will depend on the amount of e.m.f. applied
D. will depend on the radius of the circleHow does the magnetic compass needle behave in a magnetic field ?
How does the magnetic compass needle behave in a magnetic field ?A. It assures a position right angle to magnetic field
B. It starts rotating
C. It assures a position which follows a line of magnetic flux
D. None of the aboveAir gap has_________eluctance as compared to iron or steel path?
Air gap has_________eluctance as compared to iron or steel path?A. little
B. lower
C. higher
D. zeroThe relative permeability is less than unity is case of_____________?
The relative permeability is less than unity is case of_____________?A. ferromagnetic materials
B. ferrites
C. non-ferrous materials
D. diamagnetic materials