What is the induced voltage for a 450 cm long bar sliding ac

What is the induced voltage for a 45.0 cm long bar sliding across a pair of frictionless parallel tracks at a speed of 2.50 m/s in the region of a 25.0 mT magnetic field which is perpendicular to both the bar and its velocity vector. The induced EMF is _________ V.

Solution

induceed EMF E =Blv sin(teeta)

given B=0.25mT and v=2.5m/s length L=0.45m

then by substitute above values in the above equation we get

E=0.028125V