Magnetism
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Q18 ans c
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@nishant-thakre U is not minimum as the angle b/w dot product is 90,not 180.
Torque is not zero,angle b/w cross product is 90 degrees.
Evidently,you can see that dipole has net force zero.
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@arun-setty-kodavali
How it has zero force
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@nishant-thakre the dot product of dipole.moment and magnetic field is zero.
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@arun-setty-kodavali said in Magnetism:
@nishant-thakre the dot product of dipole.moment and magnetic field is zero.
Force doesn't come from dot product of moment and field
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@nishant-thakre no,force is the divergence of that quantity.
As the quantity itself is zero,it's divergence will obviously be zero.
Btw, divergence is essentially a derivative in your level.
You will learn more about divergence in your higher standard.