AIEEE 2008 | Magnetic Properties of Matter Question 68 | Physics

Relative permittivity and permeability of a material $${\varepsilon _r}$$ and $${\mu _r},$$ respectively. Which of the following values of these quantities are allowed for a diamagnetic material?

$${\varepsilon _r} = 0.5,\,\,{\mu _r} = 1.5$$

$${\varepsilon _r} = 1.5,\,\,{\mu _r} = 0.5$$

$${\varepsilon _r} = 0.5,\,\,{\mu _r} = 0.5$$

$${\varepsilon _r} = 1.5,\,\,{\mu _r} = 1.5$$

AIEEE 2006

MCQ (Single Correct Answer)

-1

Needles $${N_1}$$, $${N_2}$$ and $${N_3}$$ are made of ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them will

attract $${N_1}$$ and $${N_2}$$ strongly but repel $${N_3}$$

attract $${N_1}$$ strongly, $${N_2}$$ weakly and repel $${N_3}$$ weakly

attract $${N_1}$$ strongly, but repel $${N_2}$$ and $${N_3}$$ weakly

attract all three of them

AIEEE 2005

MCQ (Single Correct Answer)

-1

A magnetic needle is kept in a non-uniform magnetic field. It experiences :

neither a force nor a torque

a torque but not a force

a force but not a torque

a force and a torque

AIEEE 2004

MCQ (Single Correct Answer)

-1

The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is $$2s.$$ The magnet is cut along its length into three equal parts and these parts are then placed on each other with their like poles together. The time period of this combination will be

$$2\sqrt 3 \,s$$

$${2 \over 3}\,\,s$$

$$2\,s$$

$${2 \over {\sqrt 3 }}\,s$$

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