Two similar equal poles magnet when separated by a distance of 1   m , they repel with a force of 10 - 3   N . The pole strength is

Step-by-step solution

According to Question Two similar equal poles magnet are d = 1   m apart Repel by force = F = 10 - 3   N Let both magnet have pole strength = m 1 = m 2 = m μ 0 = 4 π × 10 - 7   H   m - 1 Now Relation of force F between two magnet and pole strength m F = μ 0 4 π m 1 m 2 d 2 F = μ 0 4 π m 2 d 2 m 2 = F d 2 μ 0 4 π m = F d 2 μ 0 4 π Put the all known values in the above relation m = 10 - 3 × 1 10 - 7 ⇒ 10 4 m = 100   A   m