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The magnetic intensity (H) has the same dimensions as which other magnetic quantity?
The text states that 'where H has the same dimensions as M and is measured in units of A m$^{-1}$'. The table also confirms that both M and H have dimensions [L$^{-1}$ A] and units A m$^{-1}$.
What is the unit of magnetic intensity (H)?
The text explicitly mentions that 'H has the same dimensions as M and is measured in units of A m$^{-1}$'. The summary table also lists 'A m$^{-1}$' as the unit for Magnetic intensity H.
Magnetisation (M) is defined as the net magnetic moment per unit:
The text defines magnetisation M of a sample to be equal to its net magnetic moment per unit volume: $M = m_{net}/V$ (Eq. 5.7).
A magnetic material's response to an external field is measured by its magnetic susceptibility ($\chi$). For a diamagnetic material, $\chi$ is:
The text states that 'χ is small and negative for materials, which are termed diamagnetic. In the latter case M and H are opposite in direction.' Also, 'For diamagnetic materials χ = –10$^{-5}$ whereas χ = +10$^{-5}$ for paramagnetic materials.'
Which of the following equations correctly relates Magnetisation (M) and Magnetic intensity (H) through magnetic susceptibility ($\chi$)?
Equation (5.13) in the text explicitly states: $\chi = M/H$, which can be rearranged to $M = \chi H$. This indicates how the magnetization induced in a material is proportional to the applied magnetic intensity.
The relative magnetic permeability ($\mu_r$) of a substance is given by:
The text defines relative magnetic permeability as $\mu_r = 1 + \chi$. It is a dimensionless quantity.
What is the relationship between the magnetic permeability ($\mu$) of a substance, the permeability of free space ($\mu_0$), and the relative magnetic permeability ($\mu_r$)?
The text states that 'The magnetic permeability of the substance is $\mu$ and it has the same dimensions and units as $\mu_0$; $\mu = \mu_0 \mu_r = \mu_0 (1+\chi)$'.
For a paramagnetic material, the magnetic susceptibility ($\chi$) is:
The text mentions, 'χ is small and positive for materials, which are called paramagnetic.' It explicitly cites a value of $\chi = +10^{-5}$ for paramagnetic materials.
In the equation $B = \mu_0 (H + M)$, the term $\mu_0 M$ represents:
The text states, 'This additional field Bm is proportional to the magnetisation M of the material and is expressed as Bm = $\mu_0 M$.' This field Bm is the contribution from the material core itself.
Which of the following physical quantities is dimensionless?
The table in 'POINTS TO PONDER' clearly labels Magnetic susceptibility $\chi$ as a 'Scalar' with 'Dimensions: -' and 'Units: -', indicating it is dimensionless. The text also states that '$\chi$, a dimensionless quantity'.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.