Magnetic moment of a bar magnet is 2.4 `Am^(2)`A point is situated at 20 cn from its centre on a line making an angle of `30^(@)`with axis.The magnetic induction at that point isA. `5.42xx10^(-5) Wb//m^(2)`B. `5.14xx10^(-5) Wb//m^(2)`C. `4.51xx10^(-5)Wb//m^(2)`D. `4.15xx10^(-5)Wb//m^(2)`

Magnetic moment of a bar magnet is 2.4 `Am^(2)`A point is situated at

1.	Magnetic moment of a bar magnet is 2.4 `Am^(2)`A point is situated at 20 cn from its centre on a line making an angle of `30^(@)`with axis.The magnetic induction at that point isA. `5.42xx10^(-5) Wb//m^(2)`B. `5.14xx10^(-5) Wb//m^(2)`C. `4.51xx10^(-5)Wb//m^(2)`D. `4.15xx10^(-5)Wb//m^(2)`
Answer» Correct Answer - A `B=mu_(0)/(4pi)(M)/(r^(3))sqrt(3cos^(2)theta+1)` `(4pixx10^(-7)xx2.4)/(4pixx(0.2)^(3))sqrt(3cos^(2)30+1)` `~~5.41xx10^(-5)Wb//m^(2)`

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Magnetic moment of a bar magnet is 2.4 `Am^(2)`A point is situated at 20 cn from its centre on a line making an angle of `30^(@)`with axis.The magnetic induction at that point isA. `5.42xx10^(-5) Wb//m^(2)`B. `5.14xx10^(-5) Wb//m^(2)`C. `4.51xx10^(-5)Wb//m^(2)`D. `4.15xx10^(-5)Wb//m^(2)`

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