Download App

Magnetism And Matter — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMagnetism And Matter1 Mark
MCQ
The $B-H$ curve $(i)$ and $(ii)$ shown in fig., associated with:
  • A
    $(i)$ diamagnetic and $(ii)$ paramagnetic substance.
  • B
    $(i)$ paramagnetic and $(ii)$ ferromagnetic substance.
  • ✓
    $(i)$ soft iron and $(ii)$ steel respectively.
  • D
    $(i)$ steel and $(ii)$ soft iron respectively.
✓

Answer

Correct option: C.
$(i)$ soft iron and $(ii)$ steel respectively.
Retentivity of soft iron is more than steel but coercivity of steel is more.
Retentivity$-$the ability of a substance to retain or resist magnetization, frequently measured as the strength of the magnetic field that remains in a sample after removal of an inducing field.
Coercivity$-$the resistance of a magnetic material to changes in magnetization, equivalent to the field intensity necessary to demagnetize the fully magnetized material.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Magnetism And Matter→Magnetism And Matter — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

A conducting sphere of radius $R = 20$ $cm$ is given a charge $Q = 16\,\mu C$. What is $\overrightarrow E $ at centre
→
In an electric heater 4 amp current passes for 1 minute at potential difference of 250 volt, the power of heater and energy consumed will be respectively
→
$A$ parallel sided block of glass of refractive index $1.5$ which is $36\, mm$ thick rests on the floor of a tank which is filled with water (refractive index $= 4/3)$. The difference between apparent depth of floor at $A$ & $B$ when seen from vertically above is equal to.......$mm$
→
Wave is associated with matter
→
A $8\,V$ Zener diode along with a series resistance $R$ is connected across a $20\,V$ supply (as shown in the figure). If the maximum Zener current is $25\,mA$, then the minimum value of $R$ will be $\Omega .$
→
Dielectric constant for metal is
→
Which one of the following curves represents the variation of impedance $(Z)$ with frequency $f$ in series $LCR$ circuit
→
An electron is released from the bottom plate $A$ as shown in the figure $(E = 10^4\, N/C)$. The velocity of the electron when it reaches plate $B$ will be nearly equal to
→
When light is refracted into a denser medium,
→
The minimum deviation produced by a hollow prism filled with a certain liquid is found to be $30^o $. The light ray is also found to be refracted at angle of $30^o $. The refractive index of the liquid is
→