Question

A thin magnetic needle oscillates in
the horizontal plane with a time period
of 2.0 sec. If the needle is broken into
4 equal parts perpendicular to its
length, then the time period of each
part will be

Answer 1

Explanation:

We know the equation

T = 2π √(I/mB)

As per the question , the magnet is broken into 4 parts perpendicular to its length

ie T' = T/4

       = 2 /4

      = 0.5 sec

Hope you understand

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