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.

admin:

Related Questions

  1. The transition from the state 3 n = 3 to n = 1 in a hydrogen like atom results
  2. An ideal gas is expanding such that PT²=constant. The coefficient of volume
  3. A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
  4. A body undergoes no change in volume. Poisson’s ratio is
  5. In Young’s experiment, the ratio of maximum to minimum intensities of the fringe