time period of oscillations of a magnet of magnetic moment M and moment of inertia, I in the vertical plane perpendicular to the magnetic meridian at a place where earth horizontal and vertical component of magnetic field are Bh and Bv respectively is?

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Q. Time period of qscillations of a magnet of magnetic moment M and moment of inertia I in a vertical plane perpendicular to the magnetic meridan at a place where earth's horizontal and vertical component of mgnetic field are

B_{H} a n d B_{V}

respectively is

Q. If B_H and B_V are the horizontal and vertical components of earth's magnetic field, then at magnetic poles

यदि पृथ्वी के चुम्बकीय क्षेत्र के क्षैतिज तथा ऊर्ध्वाधर घटक क्रमशः B_H तथा B_V हैं, तब चुम्बकीय ध्रुवों पर

A bar magnet of magnetic moment $M$ and moment of inertia I is freely suspended such that the magnetic axial line is in the direction of magnetic meridian. If the magnet is displaced by a very small angle $(θ)$ , the angular acceleration is (Magnetic induction of earths horizontal field $=$ $B_{H}$ )

Q. If

B

is the total intensity of earth's magnetic field,

B_{H}

is the horizontal component of earth's magnetic field and

B_{V}

is the vertical component of earth's magnetic field, then which one of the following represents the correct relation?

Q. (a) Small compass needle of magnetic moment 'm' is free to turn about an axis perpendicular to the direction of uniform magnetic field 'B'. The moment of inertia of the needle about the axis is 'I'. The needle is slightly disturbed from its stable position and then released. Prove that it executes simple harmonic motion. Hence deduce the expression for its time period.
(b) A compass needle , free to turn in a vertical plane orients itself with its axis vertical at a certain place on the earth. find out the values of (i) horizontal component of earth's magnetic field and (ii) angle of dip at the place.

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