a circuit consists of a conducting bar of length 60 cm, sliding along two parallel conducting
rails. the bar slides to the left with constant velocity through a 5.40 x 10^-4 t uniform
magnetic field and a velocity of 30 m/s.
a. find the magnitude of emf
b. find the current that passes through the resistor r = 20 ohms.
c. what is the direction of the current m