Q.371 Hard steel is suitable for making permanent magnets because A. it has good residual magnetism B. its hysteresis loop has large area C. its mechanical strength is high D. it mechanical strength is low Ans.: A Q.372 A graph Read More …
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Q.371 Hard steel is suitable for making permanent magnets because A. it has good residual magnetism B. its hysteresis loop has large area C. its mechanical strength is high D. it mechanical strength is low Ans.: A Q.372 A graph Read More …