A short bar magnet is placed horizontally along the magnetic N-S direction with its axis along the magnetic E-W direction.The resultant horizontal magnetic induction on its equator at a distance of 20 cm from centre is (B_(H)=4xx10^(-5)T)

A short bar magnet is placed horizontally along the magnetic N-S direc

1.	A short bar magnet is placed horizontally along the magnetic N-S direction with its axis along the magnetic E-W direction.The resultant horizontal magnetic induction on its equator at a distance of 20 cm from centre is (B_(H)=4xx10^(-5)T)
Answer» `4.5 Am^(2)` `5.4 Am^(2)` `5.0Am^(2)` `4.0 Am^(2)` Solution :`B_(H)=B("AXIS")=(mu_(0))/(4PI)(2M)/(r^(3))` `4xx10^(-5)=(10^(-7)xx2xxM)/(27xx10^(-3))` `therefore M=5.4Am^(2)`

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A short bar magnet is placed horizontally along the magnetic N-S direction with its axis along the magnetic E-W direction.The resultant horizontal magnetic induction on its equator at a distance of 20 cm from centre is (B_(H)=4xx10^(-5)T)

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