Hysteresis loops for two magnetic materials $A$ and $B$ are given below. These materials are used to make magnets for electric generators,transformer cores,and electromagnet cores. Then it is proper to use:
- A$A$ for transformers and $B$ for electric generators.
- B$B$ for electromagnets and transformers.
- C$A$ for electric generators and transformers.
- D$A$ for electromagnets and $B$ for electric generators.
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Similar Questions
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
The only property possessed by ferromagnetic substances is
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View Solution$A$ 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 $, A$)
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View SolutionThe coercivity of a magnet,where the ferromagnet gets completely demagnetized,is $3 \times 10^{3} \text{ A m}^{-1}$. The minimum current required to be passed in a solenoid having $1000 \text{ turns m}^{-1}$,so that the magnet gets completely demagnetized when placed inside the solenoid,is:
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View SolutionThe $B-H$ curves $S_1$ and $S_2$ in the adjoining figure are associated with:
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