1.

Two magnets of magnetic moments M and 2M are placed in a vibration magnetometre, with the identical poles in the same direction . The time period of viberation is T. If the magnets are placed with opposite poles together and vibrate with time period T_(2) then

Answer»

`T_(2)` is INFINITE
`T_(2)=T_(1)`
`T_(2) gt T_(1)`
`T_(2) lt T_(1)`

SOLUTION :(C) `T_(1)=2pisqrt((I_(1)+I_(2))/((M+2M)H))=2pisqrt((I)/(3MH))`
`T_(2)=2pisqrt((I_(1)+I_(2))/((2M-M)H))=2pisqrt((I)/(MH))`
Obviously, `T_(2) gt T_(1)`


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