What happens when small bar magnet kept on glass and iron filings sprinkled on glass ?

English

Gujarati

Hindi

5.Magnetism and Matter

medium

What happens when the small bar magnet kept on the glass and iron filings sprinkled on glass ?

Option A

Option B

Option C

Option D

Solution

When iron filings sprinkled, the arrangement of iron filing is as below :

The pattern suggests that :

$(i)$ The patterns of the iron filings suggests that the magnet has two poles similar to the positive and negative charge of an electric dipole.

– One pole is designated the north pole and the other the south pole.

$(ii)$ When suspended freely, these poles point towards the geographic north and south poles respectively.

$(iii)$ A similar pattern of iron filings is observed around a current carrying solenoid.

Standard 12

Physics

Share

Similar Questions

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 ${2^{5/4}}$ $seconds$. One of the magnets is removed and if the other magnet oscillates in the same field, then the time period in seconds is

hard

Two bar magnets having same geometry with magnetic moments $M$ and $2 M$, are firstly placed in such a way that their similar poles are same side then its time period of oscillation is $T_{1}$. Now the polarity of one of the magnet is reversed then time period of oscillation is $T_{2},$ then

hard

(AIPMT-2002)

Points $A$ and $B$ are situated perpendicular to the axis of a small bar magnet at large distances $x$ and $3 x$ from its centre on opposite sides. The ratio of the magnetic fields at $A$ and $B$ will be approximately equal to

easy

A closely wound solenoid of $800$ turns and area of cross section $2.5 \times 10^{-4} \;m ^{2}$ carries a current of $3.0\; A .$ Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

easy

Verify the Gauss’s law for magnetic field of a point dipole of dipole moment ${{\rm{\vec m}}}$ at the origin for the surface which is a sphere of radius $\mathrm{R}$.

hard