In the hysteresis cycle,the value of $H$ needed to make the intensity of magnetisation zero is called

$A$ bar magnet has a coercivity of $4 \times 10^3 \, A/m$. It is desired to demagnetize it by inserting it inside a solenoid $12 \, cm$ long and having $60$ turns. The current that should be sent through the solenoid is... (in $, A$)

In the hysteresis curve,the value of magnetic induction $(B)$ which remains in a substance when the value of the magnetizing force $(H)$ is made zero $(H=0)$ is called

The $B-H$ curve for a ferromagnet is shown in the figure. The ferromagnet is placed inside a long solenoid with $1000 \text{ turns/cm}$. The current that should be passed in the solenoid to demagnetize the ferromagnet completely is

Which of the following statements is incorrect about hysteresis?

Magnetic materials used for making permanent magnets $(P)$ and magnets in a transformer core $(T)$ have different properties. Of the following, which property best matches the type of magnet required?