Navigate

A bar magnet has a coercivity of 4×10³ Am⁻¹. It is placed inside a solenoid

A bar magnet has a coercivity of 4×10³ Am⁻¹. It is placed inside a solenoid of length 12 cm having 60 turns in order to demagnetise it. The amount of current that should be passed through the solenoid is

Options

(a) 16A
(b) 8A
(c) 4A
(d) 2A

Correct Answer:

8A

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

EAMCET2015
admin:

Related Questions

  1. The two ends of a metal rod are maintained at temperatures 100°C and 110°C.
  2. A body moves with a uniform acceleration a and zero initial velocity
  3. The frequencies of X-rays,γ-rays and ultraviolet rays are respectively p,q and r
  4. A point performs simple harmonic oscillation of period T and the equation of motion
  5. A susceptibility of a certain magnetic material is 400. What is the class