I need help answering these set of questions.

1#

In the figure, two concentric circular loops of wire carrying current in the same direction lie in the same plane. Loop 1 has radius 1.70 cm and carries 4.00 mA. Loop 2 has radius 2.80 cm and carries 5.70 mA. Loop 2 is to be rotated about a diameter while the net magnetic field B set up by the two loops at their common center is measured. Through what angle must loop 2 be rotated so that the magnitude of the net field is 95.0 nT? 1 Number i UnitsA current is set up in a wire loop consisting of a semicircle of radius 4.04 cm, a smaller concentric semicircle, and two radial straight lengths, all in the same plane. Figure (a) shows the arrangement but is not drawn to scale. The magnitude of the magnetic field produced at the center of curvature is 47.34 //T. The smaller semicircle is then flipped over (rotated) until the loop is again entirely in the same plane (Figure (b)). The magnetic field produced at the (same) center of curvature now has magnitude 15.80 /T, and its direction is reversed. What is the radius of the smaller semicircle? (a) (b) Number Units vEV J/m*3 J .5 ev*-1.m*-3 J/atom J/KE Gev/C ev-m* 2 W-m/KIn a certain cyclotron a proton moves in a circle of radius 0.720 m. The magnitude of the magnetic eld is 0.950 T. {a} What is the oscillatorfrequency? (bl What is the kinetic energyr of the proton? In the figure, a long straight wire carries a current i1 = 32.5 A and a rectangular loop carries current i2 = 15.5 A. Take a = 1.38 cm, b = 11.7 cm, and L = 23.6 cm. What is the magnitude of the net force on the loop due to i1? L Number i UnitsA circular loop of radius 16 cm carries a current of 12 A. A flat coil of radius 0.97 cm, having 49 turns and a current of 1.2 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 i Units (b) Number i UnitsThree long wires all lie in an xy plane parallel to the x axis. They intersect the y axis at the origin, y = d, and y = 2d, whered = 13 cm. The two outer wires each carry a current of 3.8 A in the positive x direction. What is the magnitude of the force on a 1.7 m section of either of the outer wires if the current in the center wire is 3.6 A (a) in the positive x direction and (b) in the negative x direction? (a) Number i Units (b) Number Units