Question

The period of oscillation of a magnet in a vibration magnetometer is 2 sec. The period of oscillation of a magnet whose magnetic moment is four times that of the first magnet is ______.

Options

• 1 sec

• 5 sec

• 8 sec

• 0.5 sec

Answer 1

The period of oscillation of a magnet in a vibration magnetometer is 2 sec. The period of oscillation of a magnet whose magnetic moment is four times that of the first magnet is 1 sec.

Explanation:

T = 2π `sqrt(("I"/("MB"_"H")))`

T' = 2π `sqrt(("I"/(4"MB"_"H")))`

= `1/2[2pisqrt("I"/(("MB"_"H")))  ]`

= `1/2xx2`

= 1 second.