First slide

Magnetism

Question

The magnetic length of a bar magnet is 10cm then its geometric length is

Easy

A

10cm
B

12cm
C

5cm
D

6cm

Solution

$M a g n e t i c L e n g t h = \frac{5}{6} G e o m e t r i c a l L e n g t h$
$G . L = \frac{6}{5} M . L = \frac{6}{5} (10) = 12 c m$

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