question_answer

A U-shaped wire of mass m and length\[\ell \] is immersed with its two ends in mercury (see figure). The wire is in a homogeneous field of magnetic induction B. If a charge, that is, a current pulse\[q=\int{i\,dt}\], is sent through the wire, the wire will jump up. Calculate, the height h (in metre) that the wire reaches, assuming that the time of the current pulse is very small in comparison with the time of flight. \[\left( \frac{q}{m}=2C/kg,\ell =1m,B=5T \right)\].

Answer:

5.00