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. A ballon rises from rest with a constant acceleration g/8. A stone is released
  2. The magnetic lines of force inside a bar magnet
  3. Find the right condition(s) for Fraunhofer diffraction due to a single slit.
  4. The de-Broglie wavelength of a proton(charge = 1.6 x 10⁻¹⁹ C, Mass = 1.6 x 10⁻²⁷ kg)
  5. The number of significant figures in 0.06900