A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.27 m. The normal to the plane of the loop is parallel to a constant magnetic field (φ = 0˚) of magnitude 0.87 T. What is the change ΔΦ in the magnetic flux that

A 50 cm × 85 cm rectangular loop of wire is located in a region of uniform magnetic field with a magnitude of B​0​​=2.46 Telsa, and oriented perpendicular to the wire loop. The wire is reshaped into a circular loop of radius r = 43 cm. What is the change in the magnitude of the the magnetic flux through the loop as a result of this change in shape?

A rod of mass 0.720 kg and radius 6.00 cm rests on two parallel rails (see figure below) that are d = 12.0 cm apart and L = 45.0 cm long. The rod carries a current of I = 70.0 A in the direction shown and rolls along the rails without slipping. A uniform magnetic field of magnitude 0.260 T is directed perpendicular to the rod and the rails. If it starts from rest, what is the speed of the rod as it leaves the rails? (Assume that the rod is of uniform density.) m/s L tea

A circular loop of radius 7.7 cm carries a current of 24 A. A flat coil of radius 1.2 cm, having 68 turns and a current of 1.8 A, is concentric with the loop. The plane of the loop is perpendicular to the plane of the coil. Assume the loop's magnetic field is uniform across the coil. What is the magnitude of (a) the magnetic field produced by the loop at its center and (b) the torque on the coil due to the loop? (a) Number Units (b) Number i Units

An electron moves in a circle of radius r = 6.19 × 10-11 m with a speed 2.47 x 106 m/s. Treat the circular path as a current loop with a constant current equal to the ratio of the electron's charge magnitude to the period of the motion. If the circle lies in a uniform magnetic field of magnitude B = 6.04 mT, what is the maximum possible magnitude of the torque produced on the loop by the field? Number i Units

A coil consisting of 88 windings of insulated wire is circular in shape with a radius r = 9.5 cm. The magnetic field is uniform throughout the coil and perpendicular to the coil's area, but it is changing with time. The magnitude of the magnetic field is initially 0.45 T and then changes at a constant rate until it has the same magnitude in the opposite direction. This change occurs over a time interval At =0.20 s. What is the magnitude of average emf induced in the coil during this time interval? E = V If instead the magnetic field in the same coil remains constant at B = 0.45 T (in the same direction perpendicular to the coil's area, initially) and the coil itself is then rotated at a constant rate until it has inverted (gone through a rotation of 180°) during a time interval At = 0.10 s, what is the magnitude of the average emf induced in the coil during this time interval?

A coil has 250 turns enclosing an area of 11.8 cm2 . In a physics laboratory experiment, the coil is rotated during the time interval 0.045 s  from a position in which the plane of each turn is perpendicular to Earth's magnetic field to one in which the plane of each turn is parallel to the field. The magnitude of Earth's magnetic field at the lab location is 5.40×10−5 T . What is the magnitude of the magnetic flux through one turn of the coil before it is rotated? What is the magnitude  of the magnetic flux through one turn of the coil after it is rotated?

A circular conductor with r=4cm is in uniform magnetic field B=5.0T that is pointing into the page. There is a clockwise current of 7.0A in the loop. What is the magnitude of torque on the loop along the y-axis which passes through the diameter of the loop?

A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.12 m. The normal to the plane of the loop is parallel to a constant magnetic field (p = 0°) of magnitude 0.73 T. What is the change AO in the magnetic flux that passes through the loop when, starting with the position shown in the drawing, the semicircle is rotated through half a revolution? B (into paper) ΔΦ =

A rod of mass 0.720 kg and radius 6.00 cm rests on two parallel rails (see figure below) that are d = 12.0 cm apart and L = 45.0 cm long. The rod carries a current of I = 36.0 A in the direction shown and rolls along the rails without slipping. A uniform magnetic field of magnitude 0.400 T is directed perpendicular to the rod and the rails. If it starts from rest, what is the speed of the rod as it leaves the rails? (Assume that the rod is of uniform density.) L 2.07 X You appear to have omitted the translational kinetic energy of the rod. m/s