1.

Magnetic dipole moment of a bar magnet is 3 hat(i) "Am"^(2) and the magnetic field intensity is 2 xx 10^(-5) T in y direction calculate the torque on the magnet.

Answer»

`2 xx 10^(-5) hat(K) Nm`
`6 xx 10^(-5) hat(k) Nm`
`6 xx 10^(-5) hat(k) Nm`
`2 xx 10^(-5) hat(i) Nm`

SOLUTION :`6 xx 10^(-5) hat(k) Nm`
`overset(to)(tau)= overset(to)(M) xx overset(to)(B)`
`= 3 hat(i) xx 2 xx 10^(-5) hat(j) = 6 xx 10^(-5) hat(k) Nm`


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