Q. A powerful bolt of lightning can carry a current of 230 kA. If two such bolts strike simultaneously at a distance of 36 m from each other, what is the magnetic force per meter exerted by one bolt on the other?
Q. A rectanbular tank is placed on wheels and is given a constant horizontal acceleration a. Show that, at steady state, the angle made by the free surface with the horizontal is given by tan(delta)=a/g.