AIPMT 2005 | Magnetism and Matter Question 40 | Physics

AIPMT 2005

MCQ (Single Correct Answer)

-1

A coil in the shape of an equilateral triangle of side $$l$$ is suspended between the pole pieces of a permanent magnet such that $$\overrightarrow B $$ is in plane of the coil. If due to a current i in the triangle a torque $$\tau $$ acts on it, the side $$l$$ of the triangle is

$${2 \over {\sqrt 3 }}\left( {{\tau \over {Bi}}} \right)$$

$$2{\left( {{\tau \over {\sqrt 3 Bi}}} \right)^{1/2}}$$

$${2 \over {\sqrt 3 }}{\left( {{\tau \over {Bi}}} \right)^{1/2}}$$

$${1 \over {\sqrt 3 }}{\tau \over {Bi}}$$

AIPMT 2005

MCQ (Single Correct Answer)

-1

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by $$\mu $$_d, $$\mu $$_p and $$\mu $$_f respectively, then

$${\mu _d} = 0$$ and $$\mu $$_p $$ \ne $$ 0

$$\mu $$_d $$ \ne $$ 0 and $$\mu $$_p = 0

$$\mu $$_p = 0 and $$\mu $$_f $$ \ne $$ 0

$$\mu $$_d $$ \ne $$ 0 and $$\mu $$_f $$ \ne $$ 0.

AIPMT 2003

MCQ (Single Correct Answer)

-1

A diamagnetic material in a magnetic field moves

from stronger to the weaker parts of the field

from weaker to the stronger parts of the field

perpendicular to the field

in none of the above directions

AIPMT 2003

MCQ (Single Correct Answer)

-1

According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature $$T$$ is proportional to

$$1/T$$

$$T$$

$$1/T$$²

$$T$$²

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