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**Unformatted text preview: **perpendicular to the plane of the coil makes an angle of 90 35 55 = = with the magnetic field. Thus, the torque exerted on the loop is ( )( )( ) ( ) 2 sin 1 0.30 T 25 A 0.30 m si NBIA = = n55 1.7 N m = 19.52 Since the magnetic force must supply the centripetal acceleration, 2 qvB mv r = or the radius of the path is r mv qB = . (a) The time for the electron to travel the semicircular path (of length r ) is ( ) ( )( ) 31 19 9 9.11 10 kg 1.60 10 C 0.010 0 T 1.79 10 s 1.79 ns r mv m t v v qB qB = = = = = =...

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