Created by StemPy LabA screw gauge has a pitch of , and its circular scale has divisions. When the two jaws are closed with nothing between them, the reference line of the main scale points at the 4th division of the circular scale. So the gauge shows divisions when it should show zero. A thin wire is now held between the jaws. Five main scale divisions (of each) are visible, and the 23rd circular division is on the reference line. The correct diameter of the wire is
← All Quizzes
← A conducting wire bent into the shape of the parabola y² = 2x carries a current i = 2 A, from point B(2,-2) to point A(2,2) (coordinates in metres). This wire lies in a uniform magnetic field B = -4k̂ tesla (field is uniform everywhere, directed into the page). What is the magnetic force on the wire?A motor boat is moving at 20 m/s on still water when its engine is switched off. From then on, the water slows it down with a retardation that is proportional to its speed: a = -kv, with k = 0.2 s⁻¹. What is the speed of the boat after it has moved 30 m with the engine off? →
Discussion (0)
Log in to join the discussion.
Loading…