First slide

The bar magnet

Question

A thin bar magnet of length 'l' and magnetic moment 'M' is bent at the mid point so that the two parts are at right angles. The new magnetic length and magnetic moment are respectively

Moderate

A

$\sqrt{2} l, \sqrt{2} M$
B

$\frac{l}{\sqrt{2}}, \frac{M}{\sqrt{2}}$
C

$\sqrt{2} l, \frac{M}{\sqrt{2}}$
D

$\frac{l}{\sqrt{2}}, \sqrt{2} M$

Solution

$l' = \sqrt{\frac{l^{2}}{4} + \frac{l^{2}}{4}} = \frac{l}{\sqrt{2}}; M' = ml' = \frac{M}{\sqrt{2}}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App