If a bar magnet of pole strength m and magnet | vedclass

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

Question

(C) Initial pole strength $= m$ and magnetic moment $= M = m 	imes (2l)$.When a magnet is cut $n$ times parallel to its axis,the pole strength of eac

Vedclass · Accepted Answer

$\frac{m}{6}, \frac{M}{24}$

Vedclass · Answer

(C) Initial pole strength $= m$ and magnetic moment $= M = m 	imes (2l)$.When a magnet is cut $n$ times parallel to its axis,the pole strength of each piece becomes $\frac{m}{n+1}$. Here,$n=5$,so the new pole strength $m' = \frac{m}{5+1} = \frac{m}{6}$.When a magnet is cut $k$ times perpendicular to its axis,the length of each piece becomes $\frac{2l}{k+1}$. Here,$k=3$,so the new length $2l' = \frac{2l}{3+1} = \frac{2l}{4}$.The magnetic moment of each piece is $M' = m' 	imes (2l') = \left(\frac{m}{6}ight) 	imes \left(\frac{2l}{4}ight) = \frac{m 	imes 2l}{24} = \frac{M}{24}$.Thus,the pole strength is $\frac{m}{6}$ and the magnetic moment is $\frac{M}{24}$.

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

Similar Questions

If $a, b$ and $c$ are the roots of $x^3+4x+1=0$,then $\frac{1}{a+b}+\frac{1}{b+c}+\frac{1}{c+a}=$

$\sum_{k=1}^{\infty} \frac{1}{k!}\left(\sum_{n=1}^k 2^{n-1}\right)$ is equal to

What is the final product $(B)$ of this sequence?

An ideal gas expands isothermally from a volume $V_1$ to $V_2$ and then is compressed to the original volume $V_1$ adiabatically. The initial pressure is $P_1$ and the final pressure is $P_3$. The total work done is $W$. Then:

Which one of the following is the ratio of the lowering of vapour pressure of $0.1 \ M$ aqueous solutions of $BaCl_2, NaCl$ and $Al_2(SO_4)_3$ respectively?

Vedclass Test Series

Exam Paper Generator

Online Exam Module