Q5.8Multiple correct
A long solenoid has 1000 turns per metre and carries a current of 1 A. It has a soft iron core of µr = 1000 . The core is heated beyond the Curie temperature, Tc.
- (a)The H field in the solenoid is (nearly) unchanged but the B field decreases drastically.
- (b)The H and B fields in the solenoid are nearly unchanged.
- (c)The magnetisation in the core reverses direction.
- (d)The magnetisation in the core diminishes by a factor of about 108.