Question

A wire having mass per unit length of 0.490 g/cm carries a 2.94 A current horizontally...

A wire having mass per unit length of 0.490 g/cm carries a 2.94 A current horizontally to the south. What are the direction and magnitude of the minimum magnetic field needed to lift this wire vertically upward?

magnitude     T
direction     ---Select--- eastward westward southward northward

An electron moves in a circular path perpendicular to a magnetic field of magnitude 0.215 T. If the kinetic energy of the electron is 4.60 ✕ 10−19 J, find the speed of the electron and the radius of the circular path.

(a) the speed of the electron
... m/s

(b) the radius of the circular path
.. μm

0 0
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