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. If the wavelength of incident light falling on a photosensitive material decreases,
  2. The binding energy per nucleon of ₃⁷Li and ₂⁴He nuclei are 5.60 MeV and 7.06MeV
  3. A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens
  4. In a circuit, L,C and R are connected in series with an alternating voltage source
  5. Three capacitors of capacitances 3 μF, 10 μF and 15 μF are connected in series