When a ferromagnetic material goes through a hysteresis loop, its… - Vidyadip

Question

When a ferromagnetic material goes through a hysteresis loop, its thermal energy is increased. Where does this energy come from?

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Answer

When a ferromagnetic material is taken through the cycle of magnetisation, magnet dipoles of the material orient and reorient with time. This molecular motion within the material results in the production of heat, which increses thermal energy of material.

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Force is example of:

Scalar
Vector
Tensor
None of these

Mass of an object is:

Scalar
Vector
Tensor
None of these

Define scalar quantity and vector quantity

Can we add vectors like ordinary algebra? If not then how vectors are added?

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Dimensions of area is:

$[L^2]$
$[L^3]$
$[M^2]$
None of these

dimensions of volume are:

$[L^2]$
$[L]$
$[L^3]$
None of these

What is uncertainty in physics$?$ Explain with one example:

define dimensions of a physical quantity:

Give list for $7$ base quantities with dimensions:

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The percentage error in the value of $R_1$ is:

3%
4%
6%
0.3%

The fractional error in the value of $R_2$ is:

$\frac{1}{40}$
$\frac{1}{50}$
$\frac{1}{100}$
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$(300\pm7)\Omega$
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2.3%
2.5
3%

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$(66.7\pm1.18)\Omega$
$(66.3\pm2)\Omega$
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Positive.
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