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A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2.m, 100 turns, and carrying a current of 5.2A.  The coercivity of the bar magnet is:

a.

1200A\m

b.

2600A/m

c.

520A/jm

d.

285A/m



Question ID - 50042 | SaraNextGen Top Answer

A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2.m, 100 turns, and carrying a current of 5.2A.  The coercivity of the bar magnet is:

a.

1200A\m

b.

2600A/m

c.

520A/jm

d.

285A/m

1 Answer
127 votes
Answer Key / Explanation : (b) -

Coercivity=H=

=ni= 5.2

= 2600A/m.

127 votes


127