A magnetic needle suspended horizontally by an unspun silk fibre, osci – McqOptions

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1.	A magnetic needle suspended horizontally by an unspun silk fibre, oscillates in the horizontal plane because of the restoring force originating mainly from [CPMT 1980, 89]
A.	The torsion of the silk fibre
B.	The force of gravity
C.	The horizontal component of earth's magnetic field
D.	All the above factors
Answer» D. All the above factors

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