Advertisements
Advertisements
प्रश्न
If the magnetizing field on a ferromagnetic material is increased, its permeability ______.
पर्याय
decreases
increases
remains unchanged
first decreases and then increases
Advertisements
उत्तर
If the magnetizing field on a ferromagnetic material is increased, its permeability decreases.
APPEARS IN
संबंधित प्रश्न
Show diagrammatically the behaviour of magnetic field lines in the presence of (i) paramagnetic and (ii) diamagnetic substances. How does one explain this distinguishing feature?
Explain Curie’s law for a paramagnetic substance.
Which of the following substances are para-magnetic?
Bi, Al, Cu, Ca, Pb, Ni
A tangent galvanometer shows a deflection of 45° when 10 mA of current is passed through it. If the horizontal component of the earth's magnetic field is `B_H = 3.6 xx 10^-5 "T"` and radius of the coil is 10 cm, find the number of turns in the coil.
Answer the following question.
Write three points of differences between para-, dia- and ferromagnetic materials, giving one example for each.
Which of the following statements is correct for diamagnetic materials?
Choose the correct option:
A magnetising field of 360 Am−1 produces a magnetic flux density (B) = 0.6T in a ferromagnetic material. What is its permeability in Tm A−1?
Answer in brief.
Discuss the Curie law for paramagnetic material.
A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?
From molecular view point, discuss the temperature dependence of susceptibility for diamagnetism, paramagnetism and ferromagnetism.
