1.

A longsolenoidhas 1000 per meterand carries a curretn of 1A it has a soft iron core of mu_(r) =1000 the core is heatedbeyond the curie temperature T_(c )

Answer»

the h field in the solenoid is unchanged but the B field DECREASES drasticaly
the h and b fields in the solenoid arenearly unchanged
the magnetisation in the core REVERSE direction
the magnetisation in the core diminishes by a factorof about`10^(8)`

Answer :A::D


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