A material has N spins per m³. If Np are the dipoles per m³ parallel – McqOptions

MCQOPTIONS

1.	A material has N spins per m³. If Np are the dipoles per m³ parallel to field and Na are the dipoles per m³ anti-parallel to field, the magnetisation is
A.	A
B.	B
C.	C
D.	D
Answer» B. B

Discussion

No Comment Found

Related MCQs

The spin angular momentum along a given direction is either or .
For a diamagnetic material, μr = 1.
If ω0 is the angular frequency of rotation of electron in the absence of magnetic field, the angular frequency ω, when a magnetic field B is acting is ω ≅ ω0 + (e/2m)B.
M = (μr - 1)H.
If e is the charge of an electron, R is the radius of its orbit and ω is the angular velocity of electron, the magnetic dipole moment μm of the orbit is |μm| = eωR2.
If B, H and M denote flux density, field intensity and magnetisation, B = μ0 (H + M).
A leaky dielectric has ∈r = ∈r' - j∈r". If a field E is applied, the current component in phase with E is proportional to ∈r".
If ∈r = ∈r' - j∈r" tan δ = .
The equation D = ∈0∈r E refers only to isotropic materials.
In an homogeneous dielectric subjected to an electric field E, the dipole moment per unit volume is ∈0(∈r - 1) E.