Back to MAGNETISM AND MATTER

JEE PHYSICS MCQ: MAGNETISM AND MATTER

1 Medium

1 of 1

Understanding +4 | -1

Assertion:

MnO_2

is ferromagnetic.
Reason: Domains are equally aligned in parallel and anti parallel direction.

View answer and explanation

Correct option: C

If Assertion is True but the Reason is False

Option D (If both Assertion & Reason are false) is correct because

MnO_2

is actually antiferromagnetic, not ferromagnetic, and the reason provided about domain alignment is characteristic of antiferromagnetic materials.

More Questions from MAGNETISM AND MATTER

Practice All Chapter MCQs →

Curie temperature is the one above which A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is

{2^{5/4}}

s. One of the magnets is removed and if the other magnet oscillates in the same field , then the time period in second is The relative permeability of a substance

X

is slightly less than unity and that of substance

Y

is slightly more than unity, then A bar magnet is equivalent to If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by

\mu_{\mathrm{d}}, \mu_{\mathrm{p}}

\mu_{\mathrm{f}}

respectively, then :- Which of the following is most suitable for the core of electromagnets