l20cm B100T R45ohms and v20ms A Find the current in the resi

l=20cm, B=1.00T, R=4.5ohms, and v=2.0m/s.

A) Find the current in the resistor. (2 sig figs)

B) Find the magnetic force on the bar. (2sig figs)

C) Find the power dissipation in the resistor. (2 sig figs)

D) Find the rate of the mechanical work done by the agent pulling the bar. (2sig figs)

induced emf = VBL

=> induced current = VBL/R = 2*1*0.2)/(4.5 = 0.08888 A

B) magnetic force = BIL = 1*0.08888*0.2 = 0.017776 A

C) power = i^2R = 0.08888^2*4.5 = 0.03554 watt

d) rate of mechanical work = power = 0.03554 watt