A long magnetic needle of length 2L,magnetic | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) When a magnetic needle is cut perpendicular to its length into two equal pieces,the pole strength $m$ of each new piece remains the same as the or

Vedclass · Accepted Answer

$\frac{M}{2}, m$

Vedclass · Answer

(C) When a magnetic needle is cut perpendicular to its length into two equal pieces,the pole strength $m$ of each new piece remains the same as the original,because the cross-sectional area of the magnet does not change.The length of each new piece becomes $L' = \frac{2L}{2} = L$.The magnetic moment $M'$ of each new piece is given by the product of its pole strength and its new length:$M' = m 	imes L' = m 	imes L$.Since the original magnetic moment $M = m 	imes (2L) = 2mL$,we can write:$M' = \frac{M}{2}$.Therefore,the magnetic moment of each piece is $\frac{M}{2}$ and the pole strength is $m$.

$A$ long magnetic needle of length $2L$,magnetic moment $M$,and pole strength $m$ is broken into two equal pieces at the middle. The magnetic moment and pole strength of each piece will be

Similar Questions

If a bar magnet of pole strength $m$ and magnetic moment $M$ is cut equally $5$ times parallel to its axis and again $3$ times perpendicular to its axis, then the pole strength and magnetic moment of each piece are respectively

What is the magnitude of the equatorial and axial fields due to a bar magnet of length $5.0 \; cm$ at a distance of $50 \; cm$ from its mid-point? The magnetic moment of the bar magnet is $0.40 \; A m^{2}$.

What happens to the force between two magnetic poles when their pole strength and the distance between them are both doubled?

What is magnetism and what is a magnet?

If two identical bar magnets, each of length $l$, pole strength $m$ and magnetic moment $M$ are placed perpendicular to each other with their unlike poles in contact, the magnetic moment of the combination is

Vedclass Test Series

Exam Paper Generator

Online Exam Module