If the magnetic moment and the pole strength of a bar magnet are 3.6 × 10 - 3   A   m 2 and 120 × 10 - 3   A   m , then its magnetic length is

Step-by-step solution

For a bar magnet, the magnetic moment is M   =   p o l e   s t r e n g t h × m a g n e t i c   l e n g t h So the magnetic length will be l mag = M m ⇒ l mag = 3.6 × 10 - 3 120 × 10 - 3 = 3 × 10 - 2   m = 3   c m