A magnetic needle of magnetic moment 0.9 Am^(2) and pole strength 5Am is pivoted so that it is free to turn in a horizontal plane at a position where the earth's B-field is 3.6 xx 10^(-5) tesla. It is in equilibrium at an angle 30^(@) from the magnetic meridian when it is pulley by a string attached to its north pole in the easterly direction. what is the tension of the string ?

A magnetic needle of magnetic moment 0.9 Am^(2) and pole strength 5Am

1.	A magnetic needle of magnetic moment 0.9 Am^(2) and pole strength 5Am is pivoted so that it is free to turn in a horizontal plane at a position where the earth's B-field is 3.6 xx 10^(-5) tesla. It is in equilibrium at an angle 30^(@) from the magnetic meridian when it is pulley by a string attached to its north pole in the easterly direction. what is the tension of the string ?
Answer» ANSWER :`2.08 XX 10^(-4)N`

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