Advertisements
Advertisements
Question
The BH curve for a ferromagnetic material is shown in the figure. The material is placed inside a long solenoid which contains 1000 turns/cm. The current that should be passed in the solenonid to demagnetize the ferromagnet completely is
Options
1.00 m A
1.25 mA
1.50 mA
1.75 mA
Advertisements
Solution
1.50 mA
APPEARS IN
RELATED QUESTIONS
Iron (z=26) is highly ferromagnetic. Explain.
Write the type of magnetism observed when the magnetic moments are aligned in parallel and anti-parallel directions in unequal numbers.
Analysis shows that nickel oxide has the formula Ni0.98O1.00. What fractions of nickel exist as Ni2+ and Ni3+ ions?
Explain the following with suitable examples:
Ferrimagnetism
What is magnetic susceptibility?
Compare dia, para and ferromagnetism.
Substances that are strongly attracted by the applied magnetic field and can be permanently magnetized are ____________.
Which of the following statements is not true?
Which of the following statements are correct?
- Electric monopoles do not exist whereas magnetic monopoles exist.
- Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
- Magnetic field lines are completely confined within a toroid.
- Magnetic field lines inside a bar magnet are not parallel.
- χ = -1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.
The susceptibility of a paramagnetic material is 99. The permeability of the material in Wb/A-m is ______.
[permeability of the free space μ0 = 4π × 10-7 Wb/A - m]
