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A loop is formed by two parallel conduct...

A loop is formed by two parallel conductors connected by a solenoid with inductance L=2H and a conducting rod of mass m=80g, which can freely (without fricition) slide over the conductors. The conductors are located in a horizontal plane in a uniform vertical magnetic field with induction B=4T.
The distance between the conductors is equal to l=4cm. At the moment t=0 the rod is imparted an initial velocity `v_(0)=2 cm//s` directed to the right. Find the amplitude (in cm) for the oscillations of conducting rod, if the electric resistance of the loop is negligible.

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