Lesson: The Torque on a Current-Carrying Rectangular Loop of Wire in a Magnetic Field

The diagram shows a rectangular loop of current-carrying wire between the poles of a magnet. The longer sides of the loop are initially parallel to the magnetic field, and the shorter sides of the loop are initially perpendicular to the magnetic field. The loop then rotates through so that all its sides are perpendicular to the magnetic field. Which of the lines on the graph correctly represents the change in the torque acting on the loop as the angle its longest sides make with the magnetic field direction varies from to ?

The diagram shows a rectangular conducting coil with 5 turns that is in a magnetic field with a strength of 650 mT. The sides of the loop parallel to line are parallel to the magnetic field, and the sides of the loop parallel to line are perpendicular to the magnetic field. The length of and the length of . The torque on the loop is 1.2 mN⋅m. What is the current in the loop? Answer to the nearest milliampere.