The magnetic induction due to a bar magnet of length `6 xx 10^(-2)m` and pole strength `5 xx 10^(-3)Am` at a point 0.1 m away from the centre and along the equator

Options

A. `3xx10^(-8)N //amp m`
B. `3xx10^(-10)N//amp m`
C. `(1//3)xx10^(-7)N//amp m`
D. `5xx10^(-10)N//amp m`

Answer

A

Explanation

`B=(mu_(0))/(4pi)(M)/(r^(2))=(mu_(0))/(4pi)(m2l)/(r^(3))`
`=(10^(-7)xx5xx10^(-3)xx6xx10^(-2))/(10^(-3))`
`3xx10^(-8)N//Am`