- A rod of mass 0.72 kg and radius 0.06 m rests on two parallelrails that are d = 0.12 m apart and L = 0.45 m long. The rodcarries a current of I = 48 A. If it starts from rest, what is thespeed of the rod as it leaves the rails if there is a uniformmagnetic field of magnitude 0.24 T directed perpendicular to therod and rails? Answer in units of m/s.
                      a) 23.1 m/s
                       b) 13.1 m/s
c) 15.7 m/s
d) 1.31 m/s
- Consider a series RC circuit for which R = 0.9 MΩ, C = 4.5 μF,and V = 28 V. Find the charge on the capacitor 8 s after the switchis closed. Answer in units of μC.
          Â
A) 118 μC
               B) 108 μC
              C) 358 μC
              D) 10.8 μC
- Two equal charges of magnitude +1 C are separated by a distanceof 1 km. What is the force acting between these two charges?
- 0.9 N
- 9 N
- 90 N
- 9000 N
