JEE PHYSICS MCQ: MAGNETISM AND MATTER

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Two magnets of magnetic moments

m

and

\sqrt{3} m

are joined to form a cross (+). The combination is suspended freely in a uniform magnetic field. In equilibrium position, the magnet of magnetic moment

m

makes an angle

\theta

with the field. Find

\theta

View answer and explanation

Correct option: A

60^{\circ}

Option A (

60^{\circ}

) is correct because at equilibrium, the torques due to both magnets must be equal, leading to

\tan \theta = \sqrt{3}

, which gives

\theta = 60^{\circ}

More Questions from MAGNETISM AND MATTER

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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}}

and

\mu_{\mathrm{f}}

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