Tag: magnetic materials

Questions Related to magnetic materials

The magnetic susceptibility is negative for

physics magnetism and matter magnetic materials behaviour of substances in magnetic field classification of magnetic materials

  1. Paramagnetic materials only

  2. Diamagnetic material only

  3. Ferromagnetic materials only

  4. paramagnetic and ferromagnetic materials

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Correct Option: B

Which of the following species is para-magnetic

physics magnetism and matter magnetic materials behaviour of substances in magnetic field classification of magnetic materials

  1. A carbonium ion

  2. A free radical

  3. A carbonium

  4. All of these

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Correct Option: A

The relative permeability of silicon is $0.99837$ and that of palladium is $1.00692$, choose the correct option from the following :

physics magnetism and matter magnetic materials behaviour of substances in magnetic field classification of magnetic materials

  1. silicon is paramagnetic and palladium is ferromagnetic

  2. silicon is ferromagnetic and palladium is paramagnetic

  3. silicon is diamagnetic and palladium is paramagnetic

  4. Both are paramagnetic

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Correct Option: C
Explanation:

Diamagnetic           Paramagnetic             Ferromagnetic
-1 $\leq$ $\chi$ < 0                  0 < $\chi$ < $\varepsilon$                  $\chi$ >> 1
0 $\leq$ $\mu _{r}$ < 1                1 < $\mu _{r}$ < 1+ $\varepsilon$               $\mu _{r}$ >> 1
$\chi$ $=$ magnetic susceptibility
$\mu _{r}$ $=$ relative permeability.
$\varepsilon$ < 1 and small.

The relative permeability of a material is $0.9$. The material is

physics magnetism and matter magnetic materials behaviour of substances in magnetic field classification of magnetic materials

  1. diamagnetic

  2. para magnetic

  3. ferro magnetic

  4. non-magnetic

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Correct Option: A
Explanation:

diamagnetic material
$-1\leq \chi < 0$
0 $\leq$ $\mu$ < 1
$\chi$ $=$ Magnetic susceptibility
$\mu$ $=$ permeability

The susceptibility of a diamagnetic substance is

physics magnetism and matter magnetic materials behaviour of substances in magnetic field classification of magnetic materials

  1. $\infty $

  2. zero

  3. small but negative

  4. small but positive

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Correct Option: C
Explanation:

Diamagnetic sultance
-1 $\leq$ $\chi < 0$ 
$\theta =\mu < 1$
$\chi =susceptibility$